Oracle存储过程(Stored Procedure)是一组为了完成特定功能的SQL语句集,它存储在数据库中,可以通过调用来执行。存储过程可以接受参数、返回结果集,并且具有事务处理能力。使用存储过程可以提高代码的重用性、安全性和性能。 2. TRUNCATE在Oracle中的含义和作用 TRUNCATE 是Oracle SQL 中用于删除表
至于FGA_LOG$表,How to cleanup the log table FGA_LOG$ ? (Doc ID 402528.1)表明可以直接delete或者truncate没问题,如下: The FGA_LOG$tablecan be deletedfromortruncatedtomanage itsspace,forexample: SQL>connect/assysdba Connected. SQL>truncatetablefga_log$;Tabletruncated. Alternatively you candeleterecord...
By default, rows in a temporary table are stored in the default temporary tablespace of the user who creates it.However, you can assign a temporary table to another tablespace upon creation of the temporary table by using the TABLESPACE clause of CREATE GLOBAL TEMPORARY TABLE. You can use this...
a scheduling application enables college students to create optional semester course schedules. Each schedule is represented by a row in a temporary table. During the session, the schedule data is private. When the student decides on a schedule, the application moves the row for the chosen ...
A TRUNCATE statement issued on a session-specific temporary table truncates data in its own session. It does not truncate the data of other sessions that are using the same table. DML statements on temporary tables do not generate redo logs for the data changes. However, undo logs for the ...
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0 QBackup存储在 Application root内,1 QMonitor 存储在本地。 在qdcpdb1内查询数据的rowid信息: 在qdcpdb1内将表t_exte truncate掉: 这里仅将本地数据truncate掉了。 查看执行计划: 以上执行计划走的EXTENDED DATA LINK。 这里只做了TABLE的演示,关于其他对象的共享方式与之相近,不在演示。
TRUNCATE LOGOFF事件只可以指定触发时间为BEFORE。SUSPEND和LOGON事件只可以触发时间为AFTER。 创建一个用户事件的触发器,用来记录用户SCOTT所删除的所有对象。 以用户SCOTT身份连接到数据库,并创建一个用户存储信息的表: CREATE TABLE SCOTT.DROP_OBJ (object_name varchar2(20), object_type varchar2(20), dropped_...
The CREATE TABLE statement in Oracle databases is used to create new tables. GaussDB(DWS) also supports this statement. So it does not need to be migrated.The ALTER TABLE
update emp set sal=sal+100 where deptno in (select deptno from dept where loc='NEW YORK') 删除数据 语法: DELETE FROM 表名WHERE删除条件; 在删除语句中如果不指定删除条件的话就会删除所有的数据 Truncate table实现数据删除 比较truncat与delete实现数据删除?