1,安装Oracle时,安装路径和源路径都必须是英文的。2,做例题的时候用到Oracle的JDBC,遇到困难,解决后得出结论如下:
1,安装Oracle时,安装路径和源路径都必须是英文的。
2,做例题的时候用到Oracle的JDBC,遇到困难,解决后得出结论如下:
classes12.jar - for Java 1.2 and 1.3
ojdbc14.jar - for Java 1.4 and 1.5
ojdbc5.jar - for Java 1.5
ojdbc6.jar - for Java 1.6
oracle92自带jdk为1.3,,虽然我的开发环境是1.6,可是在配置文件中仍然选用classes12.jar - for Java 1.2 and 1.3
jdbc版本与java版本有关。并且jdbc的运行于oracle自带的jdk版本有关。
3,配置数据源的时候,需要更改tomcat-config-context.xml
driverClassName="oracle.jdbc.OracleDriver" url="jdbc:oracle:thin:@127.0.0.1:1521:ora92"/> 其中url里,ip127.0.0.1是指你要连接的数据库所在服务端的ip地址;ora92指的是全局数据库名;1521是端口号。

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

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No,youshouldnotusetherootuserinMySQLforyourproduct.Instead,createspecificuserswithlimitedprivilegestoenhancesecurityandperformance:1)Createanewuserwithastrongpassword,2)Grantonlynecessarypermissionstothisuser,3)Regularlyreviewandupdateuserpermissions

MySQLstringdatatypesshouldbechosenbasedondatacharacteristicsandusecases:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseBINARYorVARBINARYforbinarydatalikecryptographickeys.4)UseBLOBorTEXTforlargeuns


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