pply OS : Windows, Mac, Linux Apply Navicat Product : Navicat for Oracle, Navicat Premium Apply Navicat Version No. : All Instant Client package is required for Basic and TNS connection type. To download Instant Client package (Instant Cli
pply OS : Windows, Mac, Linux
Apply Navicat Product : Navicat for Oracle, Navicat Premium
Apply Navicat Version No. : All
Instant Client package is required for Basic and TNS connection type. To download Instant Client package (Instant Client Package - Basic), please go to http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html
Note: Navicat version 9 or above, instant client is bundled in Navicat.
Connection Type
BasicIn Basic mode, Navicat Oracle connects to Oracle through the Oracle Call Interface (OCI). OCI is an application programming interface that allows an application developer to use a third-generation language's native procedure or function calls to access the Oracle database server and control all phases of SQL statement execution. OCI is a library of standard database access and retrieval functions in the form of a dynamic-link library.
TNS
In TNS mode, Navicat Oracle connects to Oracle server using an alias entry from a tnsnames.ora file.
Windows
Installation Instructions
Note: Navicat version 10 or below, Navicat only support 32-bit instant client.
Download the appropriate Instant Client packages for your platform. All installations REQUIRE the Basic or Basic Lite package.Note:
For Oracle 9i or above, you need Instant Client 11 or below
For Oracle 8 and 8i server, you need Instant Client 10 or below

Unzip the packages into a single directory such as "C:\instantclient_11_1".

In Options -> OCI, choose the oci.dll in the directory you defined in Step 2 ("C:\instantclient_11_1\oci.dll").

Restart Navicat.
Mac
Installation Instructions
Note: Navicat version 10 or below, Navicat only support 32-bit instant client.
Download the appropriate Instant Client packages for your platform. All installations REQUIRE the Basic or Basic Lite package.Hint:
- MAC OSX any versions running on PPC cpu should use PPC Navicat and PPC Instant Client.
- MAC OSX 10.4 or below running on INTEL cpu should use PPC Navicat and PPC Instant Client.
- MAC OSX 10.5 up running on INTEL cpu should use X86 Navicat and x86 Instant Client.
- Just simply unzip the packages and copy all files under /usr/lib or ~/lib. (Copy all files under /usr/lib for Mac OS X 10.3, otherwise, copy all files under /usr/lib or ~/lib for Mac OS X 10.4 or above.)
Tips: Besides, you can place the instant client in anywhere you like and then specify the path in Preference.
Linux
Installation Instructions
Download Instant Client packages for Microsoft Windows (32-bit). All installations REQUIRE the Basic or Basic Lite package.Note:
For Oracle 9i or above, you need Instant Client 11 or below
For Oracle 8 and 8i server, you need Instant Client 10 or below

Unzip the packages into a single directory such as "/home/test/instantclient_11_1".

In Options -> OCI, choose the oci.dll in the directory you defined in Step 2 ("/home/test/instantclient_11_1").

Restart Navicat. 1、原因:
ORA-12737: Instant Client Light: unsupported server character set CHS16GBK
Google,解释如下:
ORA-12737:
Instant Client Light: unsupported server character set string
Cause: The character set specified is not allowed for this operation or is invalid. Instant Client Light has only minimal character sets.
Action: Do not use Instant Client Light for this character set
2、首先,我们打开“tools”-->"options"菜单,见到如下界面,依据OCI library(oci.dll) 路径,导航到 navicat oci 目录下,备份里面的文件(通过在该目录新建bak文件夹,将“%dir%/Navicat Lite\instantclient_10_2”路径下的所有dll文件剪切到bak文件夹)。

3、在oracle 客户端安装目录bin/目录下,找到如下几个.dll文件

4、将上面所列文件放置到“%dir%/Navicat Lite\instantclient_10_2” 目录下,重新启动navcat即可。

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mysqloffersechar,varchar,text,and denumforstringdata.usecharforfixed Lengttrings,varcharerforvariable长度,文本forlarger文本,andenumforenforcingDataAntegrityWithaEtofValues。

优化MySQLBLOB请求可以通过以下策略:1.减少BLOB查询频率,使用独立请求或延迟加载;2.选择合适的BLOB类型(如TINYBLOB);3.将BLOB数据分离到单独表中;4.在应用层压缩BLOB数据;5.对BLOB元数据建立索引。这些方法结合实际应用中的监控、缓存和数据分片,可以有效提升性能。

掌握添加MySQL用户的方法对于数据库管理员和开发者至关重要,因为它确保数据库的安全性和访问控制。1)使用CREATEUSER命令创建新用户,2)通过GRANT命令分配权限,3)使用FLUSHPRIVILEGES确保权限生效,4)定期审计和清理用户账户以维护性能和安全。

chosecharforfixed-lengthdata,varcharforvariable-lengthdata,andtextforlargetextfield.1)chariseffity forconsistent-lengthdatalikecodes.2)varcharsuitsvariable-lengthdatalikenames,ballancingflexibilitibility andperformance.3)

在MySQL中处理字符串数据类型和索引的最佳实践包括:1)选择合适的字符串类型,如CHAR用于固定长度,VARCHAR用于可变长度,TEXT用于大文本;2)谨慎索引,避免过度索引,针对常用查询创建索引;3)使用前缀索引和全文索引优化长字符串搜索;4)定期监控和优化索引,保持索引小巧高效。通过这些方法,可以在读取和写入性能之间取得平衡,提升数据库效率。


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