数据库问题

How to define a trigger ON COMMIT in Oracle?(如何在 Oracle 中定义触发器 ON COMMIT?)...

How to check if a column exists before adding it to an existing table in PL/SQL?(如何在将列添加到 PL/SQL 中的现有表之前检查列是否存在?)...

Why does an oracle plsql varchar2 variable need a size but a parameter does not?(为什么oracle plsql varchar2 变量需要大小而参数不需要?)...

How to clone user in Oracle(如何在 Oracle 中克隆用户)...

FOR r in (SELECT ... INTO ...)(FOR r in (SELECT ... INTO ...))...

How can we define output parameter size in stored procedure?(我们如何在存储过程中定义输出参数大小?)...

retrieve out parameter from stored procedure?(从存储过程中检索参数?)...

Why do I get PLS-00302: component must be declared when it exists?(为什么我得到 PLS-00302:组件存在时必须声明?)...

Oracle : how to subtract two dates and get minutes of the result(Oracle:如何减去两个日期并获得结果的分钟数)...

How can I tell if my Oracle system is set to support Unicode or multibyte characters?(如何判断我的 Oracle 系统是否设置为支持 Unicode 或多字节字符?)...

Error ORA-00932 when using a select with union and CLOB fields(使用带有联合和 CLOB 字段的选择时出现 ORA-00932 错误)...

Tool for translation of Oracle PL/SQL into Postgresql PL/pgSQL(将 Oracle PL/SQL 翻译成 Postgresql PL/pgSQL 的工具)...