第一步:下载 安装 源 下载相应的软件包:(提供六维空间下载地址) http://bt.neu6.edu.cn/thread-1167899-1-1.html Microsoft .NET Framework 4.5 安装 下载(SQLServer2012 安装 时,要依赖这个软件,先 安装 这个,之后在 安装 SQLServer2012,好省些事
第一步:下载安装源
下载相应的软件包:(提供六维空间下载地址)
http://bt.neu6.edu.cn/thread-1167899-1-1.html
Microsoft .NET Framework 4.5安装下载(SQLServer2012安装时,要依赖这个软件,先安装这个,之后在安装SQLServer2012,好省些事)
下载网址:http://www.microsoft.com/zh-cn/download/confirmation.aspx?id=30653
第二步:正式安装
安装:选择全新的SQL Server独立安装或向现有安装添加功能
选择安装,出现如下界面,就直接进行安装向导(安装的时候自动填入了产品秘钥),界面如下图所示:
选择包括SQL Server产品更新(I),之后就直接在网上下载更新相应的产品。如下图所示:
注意:安装的时候如果打开microsoft Office软件,可能会提示,每个软件的打开具有提示的作用,请安装完成后,重启计算机才能生效。之后单击确定,之后出现如下图所示的页面:
下面这幅图是进行第二次安装操作的图(因为第一次安装出现错误了——提示没有安装Microsoft .NET Framework4,请安装Microsoft .NETFramework4之后继续安装SQL Server2012,解决了上面这个问题,继续安装成功了《解决方案,我用的是下载有一个Microsoft .NET Framework4.5版本安装》),之后就成功安装好了。
好了,圆满安装成功!!

MySQLoffersvariousstorageengines,eachsuitedfordifferentusecases:1)InnoDBisidealforapplicationsneedingACIDcomplianceandhighconcurrency,supportingtransactionsandforeignkeys.2)MyISAMisbestforread-heavyworkloads,lackingtransactionsupport.3)Memoryengineis

Common security vulnerabilities in MySQL include SQL injection, weak passwords, improper permission configuration, and unupdated software. 1. SQL injection can be prevented by using preprocessing statements. 2. Weak passwords can be avoided by forcibly using strong password strategies. 3. Improper permission configuration can be resolved through regular review and adjustment of user permissions. 4. Unupdated software can be patched by regularly checking and updating the MySQL version.

Identifying slow queries in MySQL can be achieved by enabling slow query logs and setting thresholds. 1. Enable slow query logs and set thresholds. 2. View and analyze slow query log files, and use tools such as mysqldumpslow or pt-query-digest for in-depth analysis. 3. Optimizing slow queries can be achieved through index optimization, query rewriting and avoiding the use of SELECT*.

To monitor the health and performance of MySQL servers, you should pay attention to system health, performance metrics and query execution. 1) Monitor system health: Use top, htop or SHOWGLOBALSTATUS commands to view CPU, memory, disk I/O and network activities. 2) Track performance indicators: monitor key indicators such as query number per second, average query time and cache hit rate. 3) Ensure query execution optimization: Enable slow query logs, record and optimize queries whose execution time exceeds the set threshold.

The main difference between MySQL and MariaDB is performance, functionality and license: 1. MySQL is developed by Oracle, and MariaDB is its fork. 2. MariaDB may perform better in high load environments. 3.MariaDB provides more storage engines and functions. 4.MySQL adopts a dual license, and MariaDB is completely open source. The existing infrastructure, performance requirements, functional requirements and license costs should be taken into account when choosing.

MySQL uses a GPL license. 1) The GPL license allows the free use, modification and distribution of MySQL, but the modified distribution must comply with GPL. 2) Commercial licenses can avoid public modifications and are suitable for commercial applications that require confidentiality.

The situations when choosing InnoDB instead of MyISAM include: 1) transaction support, 2) high concurrency environment, 3) high data consistency; conversely, the situation when choosing MyISAM includes: 1) mainly read operations, 2) no transaction support is required. InnoDB is suitable for applications that require high data consistency and transaction processing, such as e-commerce platforms, while MyISAM is suitable for read-intensive and transaction-free applications such as blog systems.

In MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.


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