一.原始方法 在删除大表的时候,经常会由于数据量太大,造成日志文件满了,接着无法删除数据. 以下是删除大表不记录日志的具体步骤: 1.临时设置自动提交关闭 (使用命令db2 list command options查看Auto-Commit参数状态是否为OFF,如果不是则使用db2set DB2OPTIONS=+c永久关闭) update command options using c off 2.设置不记录日志 ALTER TABLE tabname ACTIVATE NOT LOGGED I
1.SQLserver 版本: select @@version; Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (X64) Dec 28 2012 20:23:12 Copyright (c) Microsoft Corporation Enterprise Edition: Core-based Licensing (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1) (Hy
oracle官方文档提示:If you had specified DELETE INPUT rather than DELETE ALL INPUT, then RMAN would have only deleted the specific archived redo log files that it backed up. For example, RMAN would delete the logs in /arc_dest1 if these files were used as t
例子1: from table2 b where a.id=b.id) 例子2: rebatepolicy表是主表,rebatepolicyitems是从表,从表有主表的主键,现在对于主表一些条件的数据的对应子表要求删除. 如下方式: delete from rebatepolicyitems rs where exists ( from rebatepolicy r where rs.rebateguid=r.rebateguid ' and r.creator='名字' ) delete f
原文地址:http://www.cnblogs.com/simplefrog/archive/2012/07/30/2615169.html 语法delete from aa truncate table aa 区别 1.delete from后面可以写条件,truncate不可以. 2.delete from记录是一条条删的,所删除的每行记录都会进日志,而truncate一次性删掉整个页,因此日至里面只记录页释放,简言之,delete from更新日志,truncate基本不,所用的事务日志空
BEGIN FOR ind IN (SELECT index_name FROM user_indexes WHERE table_name = '') LOOP execute immediate 'DROP INDEX '||ind.index_name; END LOOP;END;/COMMIT;
/*1.FLASHBACK QUERY*/ --闪回到15分钟前 select * from orders as of timestamp (systimestamp - interval ''15'' minute) where ...... 这里可以使用DAY.SECOND.MONTH替换minute,例如: SELECT * FROM orders AS OF TIMESTAMP(SYSTIMESTAMP - INTERVAL ''2'' DAY) --闪回到某个时间点 select