SQLSERVER一些公用DLL的作用解释 如果你的SQLSERVER安装在C盘的话，下面的路径就是相应SQLSERVER版本的公用DLL的存放路径 SQL2005 C:\Program Files\Microsoft SQL Server\90\SDK\Assemblies\ SQL2008 C:\Program Files\Microsoft SQL Server\100\SDK\Assemb
SQLSERVER一些公用DLL的作用解释
如果你的SQLSERVER安装在C盘的话，下面的路径就是相应SQLSERVER版本的公用DLL的存放路径
SQL2005
C:\Program Files\Microsoft SQL Server\90\SDK\Assemblies\
SQL2008
C:\Program Files\Microsoft SQL Server\100\SDK\Assemblies\
SQL2012
C:\Program Files\Microsoft SQL Server\110\SDK\Assemblies\
可以看到随着SQLSERVER版本的升级，这些公用DLL变得越来越多了，因为SQLSERVER的功能越来越多了
这些DLL有什么用？？
这些DLL是供SQLSERVER调用的，因为这些公用DLL在SQLSERVER的很多组件中都有用到，所以SQLSERVER就把这些
DLL放到X:\Program Files\Microsoft SQL Server\X\SDK\Assemblies\文件夹下以供其他SQLSERVER组件调用
例如SSIS、SSAS、数据库引擎还有其他的工具
其实从文件夹路径名我们就可以知道这些DLL的作用：SDK\Assemblies\
大家不知道SDK的含义可以百度一下，不过可能大家比较赖，我就贴出来吧
SDK（Software Development Kit, 即软件开发工具包 ）一般是一些被软件工程师用于为特定的软件包、软件框架、硬件平台、操作系统等
建立应用软件的开发工具的集合。
资深程序员一定知道SDK的作用，他就是某个软件提供给我们程序员用来开发的一些接口或者API
本人觉得X:\Program Files\Microsoft SQL Server\X\SDK\Assemblies\文件夹下面的这些DLL不只是提供给SQLSERVER调用的
我们也可以调用这些DLL来开发SQLSERVER数据库的一些相关软件和工具
例子一：
园子里的胡勇大侠就用了下面的两个DLL来做出了： （喷血分享）利用.NET生成数据库表的创建脚本，类似SqlServer编写表的CREATE语句
Microsoft.SqlServer.ConnectionInfo.dll
Microsoft.SqlServer.Management.Sdk.Sfc.dll
例子二：
又例如这个帖子：用c#做了个,sqlServer2005里面那个事件监控器一样的程序,启动问题请帮看看
用Microsoft.SqlServer.ConnectionInfo.dll这个DLL做一个类似于SQL TRACE的工具出来，用来实时查看执行的脚本以及其他信息
例子三：
SQLDoc Sharp（SQLSERVER数据库文档生成工具）
这个工具在codeproject上可以下载：http://www.codeproject.com/Articles/35790/SQLDoc-Sharp
用到了下面的DLL
Microsoft.SqlServer.ConnectionInfo.dll
Microsoft.SqlServer.Management.Sdk.Sfc.dll
Microsoft.SqlServer.Smo.dll
Microsoft.SqlServer.SmoExtended.dll
Microsoft.SqlServer.SqlEnum.dll
公用DLL用什么语言编写？
我们可以发现上面的三个例子中的工具都是用.NET编写的工具，包括SQLDoc Sharp都是用.NET编写的winfrom软件
我们用ILSpy这个软件反编译一下各个SQLSERVER版本的下DLL
将DLL全部拖入去ILSpy里面
SQL2005
SQL2008
SQL2012
SQL2008里面有两个DLL是不能够反编译的，分别是Redist_TSqlLanguageService.dll和Redist_DACFramework.dll
SQL2012里面只有一个DLL是不能够反编译的，是Redist_TSqlLanguageService.dll
不能被反编译的DLL有可能是用C或者C++编写的
我估计这些不能反编译的dll不会提供API功能给用户，只是给SQLSERVER调用的，而且这些DLL对于SQLSERVER的性能有至关重要的作用
所以用C或者C++编写
从上面反编译这些DLL的情况来看，SQLSERVER里面有很大一部分组件或者代码都是用.NET来编写的
除了一些关键功能或者涉及到性能相关的功能组件用C或者C++编写
这里从另一个侧面也可以看出微软对.NET的重用，从SQLSERVER2005开始大量用.NET来编写一些组件代码
从上面三个例子中也可以看出为什麽他们首选.NET来编写这些工具，因为这些公用DLL本来就是.NET DLL(可托管代码)
简单介绍DLL
限于本人的能力有限，本人就只简单介绍比较熟悉的DLL，其他不熟悉的大家可以查MSDN或者百度
我这里会给出一些DLL的资料和查百度、MSDN时候的结果
我这里只介绍SQLSERVER2012的，因为SQLSERVER2012比较齐全，但是某些功能在不同的SQLSERVER版本里会有变化
例如上面第二个例子里：用c#做了个,sqlServer2005里面那个事件监控器一样的程序,启动问题请帮看看
里面说到了TMO这个类在SQL2005版本的SDK里面和SQL2008版本的SDK里面有变化，导致运行时出错
使用Trace Management Object监测和诊断SQL Server（一）
在SQL Server 2005里TMO对象被实现在了Microsoft.SqlServer.ConnectionInfo.dll里，
在SQL Server 2008里TMO对象则被移到了Microsoft.SqlServer.ConnectionInfoExtended.dll里，
但仍然在Microsoft.SqlServer.Management.Trace命名空间里。
类似上面的有变化的API我就不说了，大家开发的时候一定要查清楚MSDN和百度，不要搞错，因为这些SDK的文档比较少
大部分都是E文的，开发起来会比较头痛
废话不说了，开始~
Microsoft.AnalysisServices.DLL
Microsoft.DataWarehouse.Interfaces.DLL
SSAS，数据仓库相关的接口
Kpi 类：http://technet.microsoft.com/zh-cn/library/microsoft.analysisservices.kpi.aspx
http://technet.microsoft.com/zh-cn/magazine/microsoft.datawarehouse.interfaces.idesignertoolwindowservice.gettoolwindow.aspx
Microsoft.ExceptionMessageBox.DLL
SQLSERVER中的各种异常对话框都调用这个DLL
http://technet.microsoft.com/zh-cn/library/microsoft.sqlserver.messagebox.exceptionmessagebox.showcheckbox.aspx
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/138794c0-228f-4d8e-91d8-6ffb704f828c/microsoftexceptionmessageboxdll?forum=sqltools
Microsoft.ReportingServices.Interfaces.DLL
SSRS的相关的接口
http://support.microsoft.com/kb/873267/zh-cn
Microsoft.SqlServer.Smo.DLL
Microsoft.SqlServer.SmoExtended.DLL
Microsoft.SqlServer.Management.Sdk.Sfc.DLL
Microsoft.SqlServer.ConnectionInfo.DLL
Microsoft.SqlServer.ConnectionInfoExtended.DLL
SMO：SQLSERVER管理对象
监控SQLSERVER或者连接SQLSERVER用到
提供SMO对象功能，是SqlServer Management Ojbects的简称，由SQL2005提供的管理对象
只要SQL Server Management Studio能实现的东西，用smo都能实现，因为SQL Server Management Studio就是用smo开发的。
如果你有足够的实力，完全可以开发一个可以藐视SQL Server Management Studio的工具，比如加入智能感知的功能
为了支持 SQL Server 的管理，Integration Services 提供了可以遍历 SQL 管理对象 (SMO) 的对象的枚举器。
例如，包可使用 SMO 枚举器对某个 SQL Server 安装中的 Jobs 集合中的每个作业执行相同的管理功能。
http://support.microsoft.com/kb/956026/zh-cn
http://support.microsoft.com/kb/922214/zh-cn
http://blogs.msdn.com/b/sqlcrd/archive/2009/01/14/trace-management-object-sql-server.aspx
http://msdn.microsoft.com/en-us/library/microsoft.sqlserver.management.smo.aspx
Microsoft.SqlServer.Dts.Design.DLL
Microsoft.SqlServer.DTSPipelineWrap.DLL
Microsoft.SQLServer.DTSRuntimeWrap.DLL
Microsoft.SQLServer.ManagedDTS.DLL
Data Transformation Services (DTS) 数据传输服务相关的DLL
http://bbs.csdn.net/topics/200087190
http://social.msdn.microsoft.com/Forums/sqlserver/zh-CN/916a39c4-c35a-4ba1-8f7a-dde4aadb1675/assembilies-microsoftsqlserverdtspipelinewrap?forum=sqlintegrationservices
http://social.msdn.microsoft.com/Forums/zh-CN/10a94835-8913-40c6-82f5-1d4da37da730/microsoftsqlservermanageddtsdll-not-working?forum=sqlintegrationservices
Microsoft.SqlServer.Management.RegisteredServers.DLL
注册服务器需要用到的DLL
http://connect.microsoft.com/SQLServer/feedback/details/369377/microsoft-sqlserver-management-registeredservers-dll-missing
http://social.msdn.microsoft.com/Forums/sqlserver/zh-CN/7fa941bd-68d3-4ae2-9673-8ab4f7cb2602/microsoftsqlservermanagementregisteredserversdll?forum=sqlsmoanddmo
Microsoft.SqlServer.Management.Utility.DLL
Microsoft.SqlServer.Management.UtilityEnum.DLL
Utility：实用工具类代表一个控制点（UCP）定义的SQL服务器来管理一个或多个的远程SQLSERVER实例的方法和属性
UtilityEnum：该microsoft.sqlserver.management.utility命名空间包含展现SQLSERVER实用工具对象的类
http://msdn.microsoft.com/zh-cn/library/ee242093(v=sql.110).aspx
http://technet.microsoft.com/zh-cn/magazine/microsoft.sqlserver.management.utility(SQL.105).aspx
Microsoft.SqlServer.Management.XEvent.DLL
Microsoft.SqlServer.Management.XEventEnum.DLL
扩展事件相关的DLL
XEvent：在SQLSERVER客户端组件和服务器端组件里创建和使用SQLSERVER扩展事件通过通用对象模型
扩展事件基础设施支持SQL服务器事件数据的相关性
在某些情况下，基础设施也可以用于从数据看应用程序和操作系统里获取相关数据
http://msdn.microsoft.com/zh-cn/library/microsoft.sqlserver.management.xevent.aspx
Microsoft.SqlServer.OlapEnum.DLL
olap系统相关的DLL
Microsoft.SqlServer.Rmo.DLL
Microsoft.SqlServer.Replication.DLL
与复制相关的DLL
RMO：复制管理对象
http://social.msdn.microsoft.com/Forums/sqlserver/zh-CN/fd02b8ad-db40-4785-993f-1adfd00d5a0e/sql-server-2008-r2-replication-management-objects-sqlrmomsi-?forum=sqlreplication
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/07a89afe-50ba-4133-bfa5-e5f9a7a03bcb/rmo-replication-between-sql-server-2005-amd-sql-server-2005-express?forum=sqlreplication
Microsoft.SqlServer.Replication.dll 引发的IIS异常
http://social.msdn.microsoft.com/Forums/zh-CN/ff657b77-8a6e-4602-9903-9c4fca11e3b5/microsoftsqlserverreplicationdll-not-found?forum=sqlreplication
Microsoft.SqlServer.ServiceBrokerEnum.DLL
ServiceBroker相关技术的DLL
http://msdn.microsoft.com/en-us/library/microsoft.sqlserver.management.smo.broker.servicebroker.aspx
Microsoft.SqlServer.SqlWmiManagement.DLL
Microsoft.SqlServer.WmiEnum.DLL
与WMI（Windows Management Instrumentation,Windows 管理规范）相关的DLL
http://support.microsoft.com/kb/967199
打开【SQL Server 配置管理器】提示：无法连接到 WMI 提供程序。您没有权限或者该服务器无法访问。
请注意，您只能使用 SQL Server 配置管理器来管理 SQL Server 2005 服务器。
如何在SQL Server 中添加WMI alert
Microsoft.SqlServer.SString.DLL
SecureString这个类里面有很多字符串相关的C#函数
http://social.msdn.microsoft.com/Forums/sqlserver/zh-CN/22131a3d-f63b-42dc-a211-fdef785886ae/sql-server-2008-management-studio-error-when-connecting-to-server-method-not-found-int32
这个类里面的代码
类：SqlSecureString
<span> 1</span> <span>using</span><span> System;
</span><span> 2</span> <span>using</span><span> System.Data.SqlTypes;
</span><span> 3</span> <span>using</span><span> System.Globalization;
</span><span> 4</span> <span>using</span><span> System.Runtime.InteropServices;
</span><span> 5</span> <span>using</span><span> System.Security;
</span><span> 6</span> <span>using</span><span> System.Security.Cryptography;
</span><span> 7</span> <span>using</span><span> System.Security.Permissions;
</span><span> 8</span> <span>using</span><span> System.Text;
</span><span> 9</span> <span>using</span><span> System.Xml;
</span><span> 10</span> <span>using</span><span> System.Xml.Schema;
</span><span> 11</span> <span>using</span><span> System.Xml.Serialization;
</span><span> 12</span> <span>namespace</span><span> Microsoft.SqlServer.Common
</span><span> 13</span> <span>{
</span><span> 14</span> <span>public</span> <span>sealed</span> <span>class</span> SqlSecureString : ICloneable, IComparable, IComparable<sqlsecurestring><span>, IDisposable, IXmlSerializable
</span><span> 15</span> <span> {
</span><span> 16</span> <span>private</span><span> SecureString data;
</span><span> 17</span> <span>private</span> <span>int</span><span> length;
</span><span> 18</span> <span>private</span> <span>static</span><span> SqlSecureString empty;
</span><span> 19</span> <span>private</span> <span>static</span> <span>byte</span><span>[] additionalEntropy;
</span><span> 20</span> <span>public</span> <span>char</span> <span>this</span>[<span>int</span><span> index]
</span><span> 21</span> <span> {
</span><span> 22</span> <span>get</span>
<span> 23</span> <span> {
</span><span> 24</span> <span>return</span> <span>this</span><span>.ToString()[index];
</span><span> 25</span> <span> }
</span><span> 26</span> <span> }
</span><span> 27</span> <span>public</span> <span>static</span><span> SqlSecureString Empty
</span><span> 28</span> <span> {
</span><span> 29</span> <span>get</span>
<span> 30</span> <span> {
</span><span> 31</span> <span>return</span><span> SqlSecureString.empty;
</span><span> 32</span> <span> }
</span><span> 33</span> <span> }
</span><span> 34</span> <span>public</span> <span>int</span><span> Length
</span><span> 35</span> <span> {
</span><span> 36</span> <span>get</span>
<span> 37</span> <span> {
</span><span> 38</span> <span>return</span> <span>this</span><span>.length;
</span><span> 39</span> <span> }
</span><span> 40</span> <span> }
</span><span> 41</span> <span>static</span><span> SqlSecureString()
</span><span> 42</span> <span> {
</span><span> 43</span> SqlSecureString.additionalEntropy = <span>new</span> <span>byte</span><span>[]
</span><span> 44</span> <span> {
</span><span> 45</span> <span>2</span><span>,
</span><span> 46</span> <span>0</span><span>,
</span><span> 47</span> <span>0</span><span>,
</span><span> 48</span> <span>8</span><span>,
</span><span> 49</span> <span>0</span><span>,
</span><span> 50</span> <span>4</span>
<span> 51</span> <span> };
</span><span> 52</span> SqlSecureString.empty = <span>new</span><span> SqlSecureString();
</span><span> 53</span> <span> }
</span><span> 54</span> <span>public</span><span> SqlSecureString()
</span><span> 55</span> <span> {
</span><span> 56</span> <span>this</span>.data = <span>new</span><span> SecureString();
</span><span> 57</span> <span>this</span>.length = <span>0</span><span>;
</span><span> 58</span> <span> }
</span><span> 59</span> <span>public</span> SqlSecureString(<span>string</span><span> str)
</span><span> 60</span> <span> {
</span><span> 61</span> <span>if</span> (str == <span>null</span><span>)
</span><span> 62</span> <span> {
</span><span> 63</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span> 64</span> <span> }
</span><span> 65</span> <span>this</span>.data = <span>new</span><span> SecureString();
</span><span> 66</span> <span>this</span>.length = <span>0</span><span>;
</span><span> 67</span> <span>char</span>[] array =<span> str.ToCharArray();
</span><span> 68</span> <span>for</span> (<span>int</span> i = <span>0</span>; i )
<span> 69</span> <span> {
</span><span> 70</span> <span>char</span> c =<span> array[i];
</span><span> 71</span> <span>this</span><span>.data.AppendChar(c);
</span><span> 72</span> <span>this</span>.length++<span>;
</span><span> 73</span> <span> }
</span><span> 74</span> <span> }
</span><span> 75</span> <span>public</span><span> SqlSecureString(SecureString secureString)
</span><span> 76</span> <span> {
</span><span> 77</span> <span>if</span> (secureString == <span>null</span><span>)
</span><span> 78</span> <span> {
</span><span> 79</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span> 80</span> <span> }
</span><span> 81</span> <span>this</span>.data =<span> secureString.Copy();
</span><span> 82</span> <span>this</span>.length =<span> secureString.Length;
</span><span> 83</span> <span> }
</span><span> 84</span> <span>public</span> SqlSecureString(IntPtr bstr, <span>int</span><span> length)
</span><span> 85</span> <span> {
</span><span> 86</span> <span>if</span> (bstr ==<span> IntPtr.Zero)
</span><span> 87</span> <span> {
</span><span> 88</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span> 89</span> <span> }
</span><span> 90</span> <span>string</span> text =<span> Marshal.PtrToStringAuto(bstr, length);
</span><span> 91</span> <span>this</span>.data = <span>new</span><span> SecureString();
</span><span> 92</span> <span>this</span>.length = <span>0</span><span>;
</span><span> 93</span> <span>char</span>[] array =<span> text.ToCharArray();
</span><span> 94</span> <span>for</span> (<span>int</span> i = <span>0</span>; i )
<span> 95</span> <span> {
</span><span> 96</span> <span>char</span> c =<span> array[i];
</span><span> 97</span> <span>this</span><span>.data.AppendChar(c);
</span><span> 98</span> <span>this</span>.length++<span>;
</span><span> 99</span> <span> }
</span><span>100</span> <span> }
</span><span>101</span> <span>public</span> <span>void</span><span> Dispose()
</span><span>102</span> <span> {
</span><span>103</span> <span>if</span> (<span>this</span>.data != <span>null</span> && <span>this</span> !=<span> SqlSecureString.empty)
</span><span>104</span> <span> {
</span><span>105</span> <span>this</span><span>.data.Dispose();
</span><span>106</span> <span>this</span>.data = <span>null</span><span>;
</span><span>107</span> <span> }
</span><span>108</span> <span> }
</span><span>109</span> <span>public</span> <span>object</span><span> Clone()
</span><span>110</span> <span> {
</span><span>111</span> <span>return</span> <span>this</span><span>.Copy();
</span><span>112</span> <span> }
</span><span>113</span> <span>public</span> <span>static</span> <span>int</span><span> Compare(SqlSecureString strA, SqlSecureString strB)
</span><span>114</span> <span> {
</span><span>115</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, (<span>string</span><span>)strB);
</span><span>116</span> <span> }
</span><span>117</span> <span>public</span> <span>static</span> <span>int</span> Compare(SqlSecureString strA, SqlSecureString strB, <span>bool</span><span> ignoreCase)
</span><span>118</span> <span> {
</span><span>119</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, (<span>string</span><span>)strB, ignoreCase);
</span><span>120</span> <span> }
</span><span>121</span> <span>public</span> <span>static</span> <span>int</span><span> Compare(SqlSecureString strA, SqlSecureString strB, StringComparison comparisonType)
</span><span>122</span> <span> {
</span><span>123</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, (<span>string</span><span>)strB, comparisonType);
</span><span>124</span> <span> }
</span><span>125</span> <span>public</span> <span>static</span> <span>int</span> Compare(SqlSecureString strA, SqlSecureString strB, <span>bool</span><span> ignoreCase, CultureInfo cultureInfo)
</span><span>126</span> <span> {
</span><span>127</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, (<span>string</span><span>)strB, ignoreCase, cultureInfo);
</span><span>128</span> <span> }
</span><span>129</span> <span>public</span> <span>static</span> <span>int</span> Compare(SqlSecureString strA, <span>int</span> indexA, SqlSecureString strB, <span>int</span> indexB, <span>int</span><span> length)
</span><span>130</span> <span> {
</span><span>131</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, indexA, (<span>string</span><span>)strB, indexB, length);
</span><span>132</span> <span> }
</span><span>133</span> <span>public</span> <span>static</span> <span>int</span> Compare(SqlSecureString strA, <span>int</span> indexA, SqlSecureString strB, <span>int</span> indexB, <span>int</span> length, <span>bool</span><span> ignoreCase)
</span><span>134</span> <span> {
</span><span>135</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, indexA, (<span>string</span><span>)strB, indexB, length, ignoreCase);
</span><span>136</span> <span> }
</span><span>137</span> <span>public</span> <span>static</span> <span>int</span> Compare(SqlSecureString strA, <span>int</span> indexA, SqlSecureString strB, <span>int</span> indexB, <span>int</span><span> length, StringComparison comparisonType)
</span><span>138</span> <span> {
</span><span>139</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, indexA, (<span>string</span><span>)strB, indexB, length, comparisonType);
</span><span>140</span> <span> }
</span><span>141</span> <span>public</span> <span>static</span> <span>int</span> Compare(SqlSecureString strA, <span>int</span> indexA, SqlSecureString strB, <span>int</span> indexB, <span>int</span> length, <span>bool</span><span> ignoreCase, CultureInfo cultureInfo)
</span><span>142</span> <span> {
</span><span>143</span> <span>return</span> <span>string</span>.Compare((<span>string</span>)strA, indexA, (<span>string</span><span>)strB, indexB, length, ignoreCase, cultureInfo);
</span><span>144</span> <span> }
</span><span>145</span> <span>public</span> <span>static</span> <span>int</span><span> CompareOrdinal(SqlSecureString strA, SqlSecureString strB)
</span><span>146</span> <span> {
</span><span>147</span> <span>return</span> <span>string</span>.CompareOrdinal((<span>string</span>)strA, (<span>string</span><span>)strB);
</span><span>148</span> <span> }
</span><span>149</span> <span>public</span> <span>static</span> <span>int</span> CompareOrdinal(SqlSecureString strA, <span>int</span> indexA, SqlSecureString strB, <span>int</span> indexB, <span>int</span><span> length)
</span><span>150</span> <span> {
</span><span>151</span> <span>return</span> <span>string</span>.CompareOrdinal((<span>string</span>)strA, indexA, (<span>string</span><span>)strB, indexB, length);
</span><span>152</span> <span> }
</span><span>153</span> <span>public</span> <span>int</span> CompareTo(<span>object</span><span> obj)
</span><span>154</span> <span> {
</span><span>155</span> <span>int</span> result = <span>1</span><span>;
</span><span>156</span> <span>if</span> (obj != <span>null</span><span>)
</span><span>157</span> <span> {
</span><span>158</span> result = <span>this</span><span>.ToString().CompareTo(obj.ToString());
</span><span>159</span> <span> }
</span><span>160</span> <span>return</span><span> result;
</span><span>161</span> <span> }
</span><span>162</span> <span>public</span> <span>int</span><span> CompareTo(SqlSecureString other)
</span><span>163</span> <span> {
</span><span>164</span> <span>int</span> result = <span>1</span><span>;
</span><span>165</span> <span>if</span> (other != <span>null</span><span>)
</span><span>166</span> <span> {
</span><span>167</span> result = <span>this</span><span>.ToString().CompareTo(other.ToString());
</span><span>168</span> <span> }
</span><span>169</span> <span>return</span><span> result;
</span><span>170</span> <span> }
</span><span>171</span> <span>public</span> <span>static</span> SqlSecureString Concat(<span>object</span><span> obj)
</span><span>172</span> <span> {
</span><span>173</span> <span> SqlSecureString result;
</span><span>174</span> <span>if</span> (obj != <span>null</span><span>)
</span><span>175</span> <span> {
</span><span>176</span> result = <span>new</span><span> SqlSecureString(obj.ToString());
</span><span>177</span> <span> }
</span><span>178</span> <span>else</span>
<span>179</span> <span> {
</span><span>180</span> result = <span>new</span><span> SqlSecureString();
</span><span>181</span> <span> }
</span><span>182</span> <span>return</span><span> result;
</span><span>183</span> <span> }
</span><span>184</span> <span>public</span> <span>static</span> SqlSecureString Concat(<span>params</span> <span>object</span><span>[] args)
</span><span>185</span> <span> {
</span><span>186</span> <span>return</span> <span>new</span> SqlSecureString(<span>string</span><span>.Concat(args));
</span><span>187</span> <span> }
</span><span>188</span> <span>public</span> <span>bool</span> Contains(<span>string</span><span> value)
</span><span>189</span> <span> {
</span><span>190</span> <span>if</span> (value == <span>null</span><span>)
</span><span>191</span> <span> {
</span><span>192</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span>193</span> <span> }
</span><span>194</span> <span>return</span> <span>this</span><span>.ToString().Contains(value);
</span><span>195</span> <span> }
</span><span>196</span> <span>public</span> <span>bool</span><span> Contains(SqlSecureString value)
</span><span>197</span> <span> {
</span><span>198</span> <span>if</span> (value == <span>null</span><span>)
</span><span>199</span> <span> {
</span><span>200</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span>201</span> <span> }
</span><span>202</span> <span>return</span> <span>this</span><span>.ToString().Contains(value.ToString());
</span><span>203</span> <span> }
</span><span>204</span> <span>public</span><span> SqlSecureString Copy()
</span><span>205</span> <span> {
</span><span>206</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.data);
</span><span>207</span> <span> }
</span><span>208</span> <span>public</span> <span>bool</span><span> EndsWith(SqlSecureString value)
</span><span>209</span> <span> {
</span><span>210</span> <span>if</span> (value == <span>null</span><span>)
</span><span>211</span> <span> {
</span><span>212</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span>213</span> <span> }
</span><span>214</span> <span>return</span> <span>this</span><span>.ToString().EndsWith(value.ToString());
</span><span>215</span> <span> }
</span><span>216</span> <span>public</span> <span>bool</span> EndsWith(SqlSecureString value, <span>bool</span><span> ignoreCase, CultureInfo cultureInfo)
</span><span>217</span> <span> {
</span><span>218</span> <span>if</span> (value == <span>null</span><span>)
</span><span>219</span> <span> {
</span><span>220</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span>221</span> <span> }
</span><span>222</span> <span>return</span> <span>this</span><span>.ToString().EndsWith(value.ToString(), ignoreCase, cultureInfo);
</span><span>223</span> <span> }
</span><span>224</span> <span>public</span> <span>override</span> <span>bool</span> Equals(<span>object</span><span> obj)
</span><span>225</span> <span> {
</span><span>226</span> <span>bool</span> result = <span>false</span><span>;
</span><span>227</span> <span>if</span> (obj != <span>null</span><span>)
</span><span>228</span> <span> {
</span><span>229</span> result = <span>this</span><span>.ToString().Equals(obj);
</span><span>230</span> <span> }
</span><span>231</span> <span>return</span><span> result;
</span><span>232</span> <span> }
</span><span>233</span> <span>public</span> <span>bool</span><span> Equals(SqlSecureString other)
</span><span>234</span> <span> {
</span><span>235</span> <span>return</span> <span>this</span> ==<span> other;
</span><span>236</span> <span> }
</span><span>237</span> <span>public</span> <span>static</span> <span>bool</span><span> Equals(SqlSecureString strA, SqlSecureString strB)
</span><span>238</span> <span> {
</span><span>239</span> <span>return</span> strA ==<span> strB;
</span><span>240</span> <span> }
</span><span>241</span> <span>public</span> <span>bool</span><span> Equals(SqlSecureString other, StringComparison comparisonType)
</span><span>242</span> <span> {
</span><span>243</span> <span>return</span> <span>this</span>.ToString().Equals((<span>string</span><span>)other, comparisonType);
</span><span>244</span> <span> }
</span><span>245</span> <span>public</span> <span>static</span> <span>bool</span><span> Equals(SqlSecureString strA, SqlSecureString strB, StringComparison comparisonType)
</span><span>246</span> <span> {
</span><span>247</span> <span>return</span> <span>string</span>.Equals((<span>string</span>)strA, (<span>string</span><span>)strB, comparisonType);
</span><span>248</span> <span> }
</span><span>249</span> <span>public</span> <span>static</span> SqlSecureString Format(<span>string</span> format, <span>params</span> <span>object</span><span>[] arguments)
</span><span>250</span> <span> {
</span><span>251</span> <span>return</span> <span>new</span> SqlSecureString(<span>string</span><span>.Format(format, arguments));
</span><span>252</span> <span> }
</span><span>253</span> <span>public</span> <span>static</span> SqlSecureString Format(IFormatProvider formatProvider, <span>string</span> format, <span>params</span> <span>object</span><span>[] arguments)
</span><span>254</span> <span> {
</span><span>255</span> <span>return</span> <span>new</span> SqlSecureString(<span>string</span><span>.Format(formatProvider, format, arguments));
</span><span>256</span> <span> }
</span><span>257</span> <span>public</span> <span>override</span> <span>int</span><span> GetHashCode()
</span><span>258</span> <span> {
</span><span>259</span> <span>return</span> <span>this</span><span>.ToString().GetHashCode();
</span><span>260</span> <span> }
</span><span>261</span> <span>public</span> <span>int</span> IndexOf(<span>char</span><span> value)
</span><span>262</span> <span> {
</span><span>263</span> <span>return</span> <span>this</span><span>.ToString().IndexOf(value);
</span><span>264</span> <span> }
</span><span>265</span> <span>public</span> <span>int</span> IndexOf(<span>string</span><span> value)
</span><span>266</span> <span> {
</span><span>267</span> <span>return</span> <span>this</span><span>.ToString().IndexOf(value);
</span><span>268</span> <span> }
</span><span>269</span> <span>public</span> <span>int</span> IndexOf(<span>char</span> value, <span>int</span><span> startIndex)
</span><span>270</span> <span> {
</span><span>271</span> <span>return</span> <span>this</span><span>.ToString().IndexOf(value, startIndex);
</span><span>272</span> <span> }
</span><span>273</span> <span>public</span> <span>int</span> IndexOf(<span>string</span> value, <span>int</span><span> startIndex)
</span><span>274</span> <span> {
</span><span>275</span> <span>return</span> <span>this</span><span>.ToString().IndexOf(value, startIndex);
</span><span>276</span> <span> }
</span><span>277</span> <span>public</span> <span>int</span> IndexOf(<span>char</span> value, <span>int</span> startIndex, <span>int</span><span> count)
</span><span>278</span> <span> {
</span><span>279</span> <span>return</span> <span>this</span><span>.ToString().IndexOf(value, startIndex, count);
</span><span>280</span> <span> }
</span><span>281</span> <span>public</span> <span>int</span> IndexOf(<span>string</span> value, <span>int</span> startIndex, <span>int</span><span> count)
</span><span>282</span> <span> {
</span><span>283</span> <span>return</span> <span>this</span><span>.ToString().IndexOf(value, startIndex, count);
</span><span>284</span> <span> }
</span><span>285</span> <span>public</span> <span>int</span> IndexOfAny(<span>char</span><span>[] anyOf)
</span><span>286</span> <span> {
</span><span>287</span> <span>return</span> <span>this</span><span>.ToString().IndexOfAny(anyOf);
</span><span>288</span> <span> }
</span><span>289</span> <span>public</span> <span>int</span> IndexOfAny(<span>char</span>[] anyOf, <span>int</span><span> startIndex)
</span><span>290</span> <span> {
</span><span>291</span> <span>return</span> <span>this</span><span>.ToString().IndexOfAny(anyOf, startIndex);
</span><span>292</span> <span> }
</span><span>293</span> <span>public</span> <span>int</span> IndexOfAny(<span>char</span>[] anyOf, <span>int</span> startIndex, <span>int</span><span> count)
</span><span>294</span> <span> {
</span><span>295</span> <span>return</span> <span>this</span><span>.ToString().IndexOfAny(anyOf, startIndex, count);
</span><span>296</span> <span> }
</span><span>297</span> <span>public</span> SqlSecureString Insert(<span>int</span><span> startIndex, SqlSecureString value)
</span><span>298</span> <span> {
</span><span>299</span> <span>if</span> (value == <span>null</span><span>)
</span><span>300</span> <span> {
</span><span>301</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span>302</span> <span> }
</span><span>303</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().Insert(startIndex, value.ToString()));
</span><span>304</span> <span> }
</span><span>305</span> <span>public</span> SqlSecureString Insert(<span>int</span> startIndex, <span>string</span><span> value)
</span><span>306</span> <span> {
</span><span>307</span> <span>if</span> (value == <span>null</span><span>)
</span><span>308</span> <span> {
</span><span>309</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span>310</span> <span> }
</span><span>311</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().Insert(startIndex, value));
</span><span>312</span> <span> }
</span><span>313</span> <span>public</span> <span>static</span> SqlSecureString Join(<span>object</span> separator, <span>object</span><span>[] value)
</span><span>314</span> <span> {
</span><span>315</span> <span>return</span> SqlSecureString.Join(separator, value, <span>0</span><span>, value.Length);
</span><span>316</span> <span> }
</span><span>317</span> <span>public</span> <span>static</span> SqlSecureString Join(<span>object</span> separator, <span>object</span>[] value, <span>int</span> startIndex, <span>int</span><span> count)
</span><span>318</span> <span> {
</span><span>319</span> <span>if</span> (value == <span>null</span><span>)
</span><span>320</span> <span> {
</span><span>321</span> <span>throw</span> <span>new</span><span> ArgumentNullException();
</span><span>322</span> <span> }
</span><span>323</span> <span>if</span> (startIndex 0 || value.Length count)
<span>324</span> <span> {
</span><span>325</span> <span>throw</span> <span>new</span><span> ArgumentOutOfRangeException();
</span><span>326</span> <span> }
</span><span>327</span> StringBuilder stringBuilder = <span>new</span><span> StringBuilder();
</span><span>328</span> <span>if</span> (<span>0</span> count)
<span>329</span> <span> {
</span><span>330</span> <span>string</span> text = (separator != <span>null</span>) ? separator.ToString() : <span>string</span><span>.Empty;
</span><span>331</span> <span>bool</span> flag = text.Length != <span>0</span><span>;
</span><span>332</span> <span>int</span> num =<span> startIndex;
</span><span>333</span> <span>if</span> (value[num] != <span>null</span><span>)
</span><span>334</span> <span> {
</span><span>335</span> <span> stringBuilder.Append(value[num].ToString());
</span><span>336</span> <span> }
</span><span>337</span> num++<span>;
</span><span>338</span> <span>while</span> (num - startIndex count)
<span>339</span> <span> {
</span><span>340</span> <span>if</span> (value[num] != <span>null</span><span>)
</span><span>341</span> <span> {
</span><span>342</span> <span>if</span><span> (flag)
</span><span>343</span> <span> {
</span><span>344</span> <span> stringBuilder.Append(text);
</span><span>345</span> <span> }
</span><span>346</span> <span> stringBuilder.Append(value[num].ToString());
</span><span>347</span> <span> }
</span><span>348</span> num++<span>;
</span><span>349</span> <span> }
</span><span>350</span> <span> }
</span><span>351</span> <span>return</span> <span>new</span><span> SqlSecureString(stringBuilder.ToString());
</span><span>352</span> <span> }
</span><span>353</span> <span>public</span> <span>int</span> LastIndexOf(<span>char</span><span> value)
</span><span>354</span> <span> {
</span><span>355</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOf(value);
</span><span>356</span> <span> }
</span><span>357</span> <span>public</span> <span>int</span> LastIndexOf(<span>string</span><span> value)
</span><span>358</span> <span> {
</span><span>359</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOf(value);
</span><span>360</span> <span> }
</span><span>361</span> <span>public</span> <span>int</span> LastIndexOf(<span>char</span> value, <span>int</span><span> startIndex)
</span><span>362</span> <span> {
</span><span>363</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOf(value, startIndex);
</span><span>364</span> <span> }
</span><span>365</span> <span>public</span> <span>int</span> LastIndexOf(<span>string</span> value, <span>int</span><span> startIndex)
</span><span>366</span> <span> {
</span><span>367</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOf(value, startIndex);
</span><span>368</span> <span> }
</span><span>369</span> <span>public</span> <span>int</span> LastIndexOf(<span>char</span> value, <span>int</span> startIndex, <span>int</span><span> count)
</span><span>370</span> <span> {
</span><span>371</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOf(value, startIndex, count);
</span><span>372</span> <span> }
</span><span>373</span> <span>public</span> <span>int</span> LastIndexOf(<span>string</span> value, <span>int</span> startIndex, <span>int</span><span> count)
</span><span>374</span> <span> {
</span><span>375</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOf(value, startIndex, count);
</span><span>376</span> <span> }
</span><span>377</span> <span>public</span> <span>int</span> LastIndexOfAny(<span>char</span><span>[] anyOf)
</span><span>378</span> <span> {
</span><span>379</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOfAny(anyOf);
</span><span>380</span> <span> }
</span><span>381</span> <span>public</span> <span>int</span> LastIndexOfAny(<span>char</span>[] anyOf, <span>int</span><span> startIndex)
</span><span>382</span> <span> {
</span><span>383</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOfAny(anyOf, startIndex);
</span><span>384</span> <span> }
</span><span>385</span> <span>public</span> <span>int</span> LastIndexOfAny(<span>char</span>[] anyOf, <span>int</span> startIndex, <span>int</span><span> count)
</span><span>386</span> <span> {
</span><span>387</span> <span>return</span> <span>this</span><span>.ToString().LastIndexOfAny(anyOf, startIndex, count);
</span><span>388</span> <span> }
</span><span>389</span> <span>public</span> <span>static</span> <span>bool</span> <span>operator</span> ==<span>(SqlSecureString strA, SqlSecureString strB)
</span><span>390</span> <span> {
</span><span>391</span> <span>bool</span> result = <span>false</span><span>;
</span><span>392</span> <span>bool</span> flag = strA == <span>null</span><span>;
</span><span>393</span> <span>bool</span> flag2 = strB == <span>null</span><span>;
</span><span>394</span> <span>if</span> (flag &&<span> flag2)
</span><span>395</span> <span> {
</span><span>396</span> result = <span>true</span><span>;
</span><span>397</span> <span> }
</span><span>398</span> <span>else</span>
<span>399</span> <span> {
</span><span>400</span> <span>if</span> (!flag && !<span>flag2)
</span><span>401</span> <span> {
</span><span>402</span> result = (<span>0</span> == <span>string</span><span>.CompareOrdinal(strA.ToString(), strB.ToString()));
</span><span>403</span> <span> }
</span><span>404</span> <span> }
</span><span>405</span> <span>return</span><span> result;
</span><span>406</span> <span> }
</span><span>407</span> <span>public</span> <span>static</span> <span>bool</span> <span>operator</span> ==(SqlSecureString strA, <span>object</span><span> strB)
</span><span>408</span> <span> {
</span><span>409</span> <span>bool</span> result = <span>false</span><span>;
</span><span>410</span> <span>bool</span> flag = strA == <span>null</span><span>;
</span><span>411</span> <span>bool</span> flag2 = strB == <span>null</span><span>;
</span><span>412</span> <span>if</span> (flag &&<span> flag2)
</span><span>413</span> <span> {
</span><span>414</span> result = <span>true</span><span>;
</span><span>415</span> <span> }
</span><span>416</span> <span>else</span>
<span>417</span> <span> {
</span><span>418</span> <span>if</span> (!flag && !<span>flag2)
</span><span>419</span> <span> {
</span><span>420</span> result = (<span>0</span> == <span>string</span><span>.CompareOrdinal(strA.ToString(), strB.ToString()));
</span><span>421</span> <span> }
</span><span>422</span> <span> }
</span><span>423</span> <span>return</span><span> result;
</span><span>424</span> <span> }
</span><span>425</span> <span>public</span> <span>static</span> <span>bool</span> <span>operator</span> ==(<span>object</span><span> strA, SqlSecureString strB)
</span><span>426</span> <span> {
</span><span>427</span> <span>bool</span> result = <span>false</span><span>;
</span><span>428</span> <span>bool</span> flag = strA == <span>null</span><span>;
</span><span>429</span> <span>bool</span> flag2 = strB == <span>null</span><span>;
</span><span>430</span> <span>if</span> (flag &&<span> flag2)
</span><span>431</span> <span> {
</span><span>432</span> result = <span>true</span><span>;
</span><span>433</span> <span> }
</span><span>434</span> <span>else</span>
<span>435</span> <span> {
</span><span>436</span> <span>if</span> (!flag && !<span>flag2)
</span><span>437</span> <span> {
</span><span>438</span> result = (<span>0</span> == <span>string</span><span>.CompareOrdinal(strA.ToString(), strB.ToString()));
</span><span>439</span> <span> }
</span><span>440</span> <span> }
</span><span>441</span> <span>return</span><span> result;
</span><span>442</span> <span> }
</span><span>443</span> <span>public</span> <span>static</span> <span>bool</span> <span>operator</span> !=<span>(SqlSecureString strA, SqlSecureString strB)
</span><span>444</span> <span> {
</span><span>445</span> <span>return</span> !(strA ==<span> strB);
</span><span>446</span> <span> }
</span><span>447</span> <span>public</span> <span>static</span> <span>bool</span> <span>operator</span> !=(SqlSecureString strA, <span>object</span><span> strB)
</span><span>448</span> <span> {
</span><span>449</span> <span>return</span> !(strA ==<span> strB);
</span><span>450</span> <span> }
</span><span>451</span> <span>public</span> <span>static</span> <span>bool</span> <span>operator</span> !=(<span>object</span><span> strA, SqlSecureString strB)
</span><span>452</span> <span> {
</span><span>453</span> <span>return</span> !(strA ==<span> strB);
</span><span>454</span> <span> }
</span><span>455</span> <span>public</span> <span>static</span> SqlSecureString <span>operator</span> +<span>(SqlSecureString strA, SqlSecureString strB)
</span><span>456</span> <span> {
</span><span>457</span> <span>return</span> SqlSecureString.Concat(<span>new</span> <span>object</span><span>[]
</span><span>458</span> <span> {
</span><span>459</span> <span> strA,
</span><span>460</span> <span> strB
</span><span>461</span> <span> });
</span><span>462</span> <span> }
</span><span>463</span> <span>public</span> SqlSecureString PadLeft(<span>int</span><span> totalWidth)
</span><span>464</span> <span> {
</span><span>465</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().PadLeft(totalWidth));
</span><span>466</span> <span> }
</span><span>467</span> <span>public</span> SqlSecureString PadLeft(<span>int</span> totalWidth, <span>char</span><span> paddingChar)
</span><span>468</span> <span> {
</span><span>469</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().PadLeft(totalWidth, paddingChar));
</span><span>470</span> <span> }
</span><span>471</span> <span>public</span> SqlSecureString PadRight(<span>int</span><span> totalWidth)
</span><span>472</span> <span> {
</span><span>473</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().PadRight(totalWidth));
</span><span>474</span> <span> }
</span><span>475</span> <span>public</span> SqlSecureString PadRight(<span>int</span> totalWidth, <span>char</span><span> paddingChar)
</span><span>476</span> <span> {
</span><span>477</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().PadRight(totalWidth, paddingChar));
</span><span>478</span> <span> }
</span><span>479</span> <span>public</span> SqlSecureString Remove(<span>int</span><span> startIndex)
</span><span>480</span> <span> {
</span><span>481</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().Remove(startIndex));
</span><span>482</span> <span> }
</span><span>483</span> <span>public</span> SqlSecureString Remove(<span>int</span> startIndex, <span>int</span><span> count)
</span><span>484</span> <span> {
</span><span>485</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().Remove(startIndex, count));
</span><span>486</span> <span> }
</span><span>487</span> <span>public</span> SqlSecureString Replace(<span>char</span> oldChar, <span>char</span><span> newChar)
</span><span>488</span> <span> {
</span><span>489</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().Replace(oldChar, newChar));
</span><span>490</span> <span> }
</span><span>491</span> <span>public</span><span> SqlSecureString Replace(SqlSecureString oldValue, SqlSecureString newValue)
</span><span>492</span> <span> {
</span><span>493</span> <span>return</span> <span>new</span> SqlSecureString(<span>this</span><span>.ToString().Replace(oldValue.ToString(), newValue.ToString()));
</span><span>494</span> <span> }
</span><span>495</span> <span>public</span> SqlSecureString[] Split(<span>char</span><span>[] separator)
</span><span>496</span> <span> {
</span><span>497</span> <span>return</span> SqlSecureString.StringArrayToSqlSecureStringArray(<span>this</span><span>.ToString().Split(separator));
</span><span>498</span> <span> }
</span><span>499</span> <span>public</span> SqlSecureString[] Split(<span>char</span>[] separator, <span>int</span><span> count)
</span><span>500</span> <span> {
</span><span>501</span> <span>return</span> SqlSecureString.StringArrayToSqlSecureStringArray(<span>this</span><span>.ToString().Split(separator, count));
</span><span>502</span> <span> }
</span><span>503</span> <span>public</span> SqlSecureString[] Split(<span>char</span><span>[] separator, StringSplitOptions options)
</span><span>504</span> <span> {
</span><span>505</span> <span>return</span> SqlSecureString.StringArrayToSqlSecureStringArray(<span>this</span><span>.ToString().Split(separator, options));
</span><span>506</span> <span> }
</span><span>507</span> <span>public</span> SqlSecureString[] Split(<span>char</span>[] separator, <span>int</span><span> count, StringSplitOptions options)
</span><span>508</span> <span> {
</span><span>509</span> <span>return</span> SqlSecureString.StringArrayToSqlSecureStringArray(<span>this</span><span>.ToString().Split(separator, count, options));
</span><span>510</span> <span> }
</span><span>511</span> <span>public</span> SqlSecureString[] Split(<span>string</span><span>[] separator, StringSplitOptions options)
</span><span>512</span> <span> {
</span><span>513</span> <span>return</span> SqlSecureString.StringArrayToSqlSecureStringArray(<span>this</span><span>.ToString().Split(separator, options));
</span><span>514</span> <span> }
</span><span>515</span> <span>public</span> SqlSecureString[] Split(<span>string</span>[] separator, <span>int</span><span> count, StringSplitOptions options)
</span><span>516</span> <span> {
</span><span>517</span> <span>return</span> SqlSecureString.StringArrayToSqlSecureS</sqlsecurestring>
MySQLのライセンスは、他のデータベースシステムと比較してどうですか？Apr 25, 2025 am 12:26 AMMySQLはGPLライセンスを使用します。 1）GPLライセンスにより、MySQLの無料使用、変更、分布が可能になりますが、変更された分布はGPLに準拠する必要があります。 2）商業ライセンスは、公的な変更を回避でき、機密性を必要とする商用アプリケーションに適しています。
MyisamよりもInnodbを選びますか？Apr 25, 2025 am 12:22 AMMyisamの代わりにInnoDBを選択する場合の状況には、次のものが含まれます。1）トランザクションサポート、2）高い並行性環境、3）高いデータの一貫性。逆に、Myisamを選択する際の状況には、1）主に操作を読む、2）トランザクションサポートは必要ありません。 INNODBは、eコマースプラットフォームなどの高いデータの一貫性とトランザクション処理を必要とするアプリケーションに適していますが、Myisamはブログシステムなどの読み取り集約型およびトランザクションのないアプリケーションに適しています。
MySQLの外国キーの目的を説明してください。Apr 25, 2025 am 12:17 AMMySQLでは、外部キーの機能は、テーブル間の関係を確立し、データの一貫性と整合性を確保することです。外部キーは、参照整合性チェックとカスケード操作を通じてデータの有効性を維持します。パフォーマンスの最適化に注意し、それらを使用するときに一般的なエラーを避けてください。
MySQLのインデックスのさまざまなタイプは何ですか？Apr 25, 2025 am 12:12 AMMySQLには、B-Treeインデックス、ハッシュインデックス、フルテキストインデックス、空間インデックスの4つのメインインデックスタイプがあります。 1.B-Treeインデックスは、範囲クエリ、ソート、グループ化に適しており、従業員テーブルの名前列の作成に適しています。 2。HASHインデックスは、同等のクエリに適しており、メモリストレージエンジンのHASH_TABLEテーブルのID列の作成に適しています。 3。フルテキストインデックスは、記事テーブルのコンテンツ列の作成に適したテキスト検索に使用されます。 4.空間インデックスは、地理空間クエリに使用され、場所テーブルのGEOM列での作成に適しています。
MySQLでインデックスをどのように作成しますか？Apr 25, 2025 am 12:06 AMtocreateanindexinmysql、usethecreateindexstatement.1）forasinglecolumn、 "createdexidx_lastnameonemployees（lastname）;" 2）foracompositeindexを使用して、 "createindexidx_nameonemployees（lastname、firstname）;" 3）; "3）、" 3）を使用します
MySQLはSQLiteとどのように違いますか？Apr 24, 2025 am 12:12 AMMySQLとSQLiteの主な違いは、設計コンセプトと使用法のシナリオです。1。MySQLは、大規模なアプリケーションとエンタープライズレベルのソリューションに適しており、高性能と高い並行性をサポートしています。 2。SQLiteは、モバイルアプリケーションとデスクトップソフトウェアに適しており、軽量で埋め込みやすいです。
MySQLのインデックスとは何ですか？また、パフォーマンスをどのように改善しますか？Apr 24, 2025 am 12:09 AMMySQLのインデックスは、データの取得をスピードアップするために使用されるデータベーステーブル内の1つ以上の列の順序付けられた構造です。 1）インデックスは、スキャンされたデータの量を減らすことにより、クエリ速度を改善します。 2）B-Tree Indexは、バランスの取れたツリー構造を使用します。これは、範囲クエリとソートに適しています。 3）CreateIndexステートメントを使用して、createIndexidx_customer_idonorders（customer_id）などのインデックスを作成します。 4）Composite Indexesは、createIndexIDX_CUSTOMER_ORDERONORDERS（Customer_Id、Order_date）などのマルチコラムクエリを最適化できます。 5）説明を使用してクエリ計画を分析し、回避します
データの一貫性を確保するために、MySQLでトランザクションを使用する方法を説明します。Apr 24, 2025 am 12:09 AMMySQLでトランザクションを使用すると、データの一貫性が保証されます。 1）StartTransactionを介してトランザクションを開始し、SQL操作を実行して、コミットまたはロールバックで送信します。 2）SavePointを使用してSave Pointを設定して、部分的なロールバックを許可します。 3）パフォーマンスの最適化の提案には、トランザクション時間の短縮、大規模なクエリの回避、分離レベルの使用が合理的に含まれます。
ホットAIツール
Undresser.AI Undress
リアルなヌード写真を作成する AI 搭載アプリ
AI Clothes Remover
写真から衣服を削除するオンライン AI ツール。
Undress AI Tool
脱衣画像を無料で
Clothoff.io
AI衣類リムーバー
Video Face Swap
完全無料の AI 顔交換ツールを使用して、あらゆるビデオの顔を簡単に交換できます。
人気の記事
ホットツール
SecLists
SecLists は、セキュリティ テスターの究極の相棒です。これは、セキュリティ評価中に頻繁に使用されるさまざまな種類のリストを 1 か所にまとめたものです。 SecLists は、セキュリティ テスターが必要とする可能性のあるすべてのリストを便利に提供することで、セキュリティ テストをより効率的かつ生産的にするのに役立ちます。リストの種類には、ユーザー名、パスワード、URL、ファジング ペイロード、機密データ パターン、Web シェルなどが含まれます。テスターはこのリポジトリを新しいテスト マシンにプルするだけで、必要なあらゆる種類のリストにアクセスできるようになります。
SublimeText3 Linux 新バージョン
SublimeText3 Linux 最新バージョン
DVWA
Damn Vulnerable Web App (DVWA) は、非常に脆弱な PHP/MySQL Web アプリケーションです。その主な目的は、セキュリティ専門家が法的環境でスキルとツールをテストするのに役立ち、Web 開発者が Web アプリケーションを保護するプロセスをより深く理解できるようにし、教師/生徒が教室環境で Web アプリケーションを教え/学習できるようにすることです。安全。 DVWA の目標は、シンプルでわかりやすいインターフェイスを通じて、さまざまな難易度で最も一般的な Web 脆弱性のいくつかを実践することです。このソフトウェアは、
ZendStudio 13.5.1 Mac
強力な PHP 統合開発環境
Safe Exam Browser
Safe Exam Browser は、オンライン試験を安全に受験するための安全なブラウザ環境です。このソフトウェアは、あらゆるコンピュータを安全なワークステーションに変えます。あらゆるユーティリティへのアクセスを制御し、学生が無許可のリソースを使用するのを防ぎます。
ホットトピック
7694
15164014139352128725122929