数据库中表内容的删除总结（总有你需要的）-白红宇

数据库中表内容的删除总结（总有你需要的）

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发布时间：2019-06-19

本文共 6357 字，大约阅读时间需要 21 分钟。

1.对数据库中的表批量清空删除（慎用）

use PL123

EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'

EXEC sp_MSForEachTable 'ALTER TABLE ? DISABLE TRIGGER ALL'

EXEC sp_MSForEachTable 'DELETE from ?'

EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'

EXEC sp_MSForEachTable 'ALTER TABLE ? ENABLE TRIGGER ALL'

EXEC sp_MSFOREACHTABLE 'SELECT * from ?'

EXEC sp_MSFOREACHTABLE 'drop table ?'

2.清空表

Truncate table tablename

delete from tablename

3.游标实现清空指定表 ！！！游标经典应用

use TOMR_SYS_C_LP --选择你要清空的

---禁用本库中所有表的约束

DECLARE Employee_Cursor CURSOR FOR

select name from sysobjects where xtype='u' and (not name LIKE 'dtproperties') order by [name] asc;

declare @tablename varchar(300);

declare @str varchar(1000);

declare @rst int;

OPEN Employee_Cursor;

FETCH NEXT FROM Employee_Cursor into @tablename;

WHILE @@FETCH_STATUS = 0

BEGIN

select @str = 'ALTER TABLE '+ @tablename + ' NOCHECK CONSTRAINT ALL';

EXECUTE(@str);

FETCH NEXT FROM Employee_Cursor into @tablename;

END

CLOSE Employee_Cursor;

DEALLOCATE Employee_Cursor;

--删除表中数据

DECLARE delete_Cursor CURSOR FOR

select name from sysobjects where xtype='u' and (not name LIKE 'dtproperties') order by [name] asc;

declare @tablename varchar(300);

declare @str varchar(1000);

declare @rst int;

OPEN delete_Cursor;

FETCH NEXT FROM delete_Cursor into @tablename;

WHILE @@FETCH_STATUS = 0

BEGIN

--这里写你不需要删据的表名

IF(@tablename = 'xx')

begin

print('未删除表数据 '+@tablename)

end

ElSE

begin

select @str = 'delete from '+ @tablename;

EXECUTE(@str);

print('删除表数据 '+@tablename)

end

FETCH NEXT FROM delete_Cursor into @tablename;

END

CLOSE delete_Cursor;

DEALLOCATE delete_Cursor;

--恢复所有表外键约束

DECLARE Employee_Cursor CURSOR FOR

select name from sysobjects where xtype='u' and (not name LIKE 'dtproperties') order by [name] asc;

declare @tablename varchar(300);

declare @str varchar(1000);

declare @rst int;

OPEN Employee_Cursor;

FETCH NEXT FROM Employee_Cursor into @tablename;

WHILE @@FETCH_STATUS = 0

BEGIN

select @str = 'ALTER TABLE '+ @tablename + ' CHECK CONSTRAINT ALL';

EXECUTE(@str);

FETCH NEXT FROM Employee_Cursor into @tablename;

END

CLOSE Employee_Cursor;

DEALLOCATE Employee_Cursor;

实例：

use tyzh

--删除表数据readerdata

DECLARE delete_Cursor CURSOR FOR

select name from sysobjects where xtype='u' and (not name LIKE 'dtproperties')

and name like 'locatedata2011%'

or name like 'ReaderData2011%'

or name like 'stayInterval2011%'

order by [name] asc;

declare @tablename varchar(300);

declare @str varchar(1000);

declare @rst int;

OPEN delete_Cursor;

FETCH NEXT FROM delete_Cursor into @tablename;

WHILE @@FETCH_STATUS = 0

BEGIN

--这里写你不需要删除数据的表名

IF(

@tablename = 'locatedata20111221'

@tablename = 'ReaderData20111221'

@tablename = 'stayInterval20111221'

)

begin

print('-------------------------')

print('未删除表数据'+@tablename)

end

ElSE

begin

select @str = 'delete from '+ @tablename;

EXECUTE(@str);

print('删除表数据'+@tablename)

end

FETCH NEXT FROM delete_Cursor into @tablename;

END

CLOSE delete_Cursor;

DEALLOCATE delete_Cursor;

系统存储批量清空SqlServer中所有表的数据

2010-12-19 14:03

清空SqlServer中所有表的数据

view sourceprint?1 sp_MSforeachtable @command1='Delete from ?'

view sourceprint?01 sp_MSforeachtable使用方法

03 1)说明

04 系统存储过程sp_MSforeachtable和sp_MSforeachdb,是微软提供的两个不公开的存储过程,从ms sql 6.5开始。

05 存放在SQL Server的MASTER数据库中。

07 2)参数说明:

08 @command1 nvarchar(2000), --第一条运行的SQL指令

09 @replacechar nchar(1) = N'?', --指定的占位符号

10 @command2 nvarchar(2000)= null, --第二条运行的SQL指令

11 @command3 nvarchar(2000)= null, --第三条运行的SQL指令

12 @whereand nvarchar(2000)= null, --可选条件来选择表

13 @precommand nvarchar(2000)= null, --执行指令前的操作(类似控件的触发前的操作)

14 @postcommand nvarchar(2000)= null --执行指令后的操作(类似控件的触发后的操作)

16 3)举例

17 --统计数据库里每个表的详细情况

18 exec sp_MSforeachtable @command1="sp_spaceused '?'"

19 --获得每个表的记录数和容量:

20 EXEC sp_MSforeachtable @command1="print '?'",

21 @command2="sp_spaceused '?'",

22 @command3= "SELECT count(*) FROM ? "

23 --获得所有的数据库的存储空间:

24 EXEC sp_MSforeachdb @command1="print '?'",

25 @command2="sp_spaceused "

26 --检查所有的数据库

27 EXEC sp_MSforeachdb @command1="print '?'",

28 @command2="DBCC CHECKDB (?) "

29 --更新PUBS数据库中已t开头的所有表的统计:

30 EXEC sp_MSforeachtable @whereand="and name like 't%'",

31 @replacechar='*',

32 @precommand="print 'Updating Statistics.....' print ''",

33 @command1="print '*' update statistics * ",

34 @postcommand= "print''print 'Complete Update Statistics!'"

35 --删除当前数据库所有表中的数据

36 sp_MSforeachtable @command1='Delete from ?'

37 sp_MSforeachtable @command1 = "TRUNCATE TABLE ?"

39 4)参数@whereand的用法

40 @whereand参数在存储过程中起到指令条件限制的作用,具体的写法如下:

41 @whereend,可以这么写 @whereand=' AND o.name in (''Table1'',''Table2'',.......)'

42 例如:我想更新Table1/Table2/Table3中NOTE列为NULL的值

43 sp_MSforeachtable @command1='Update ? Set NOTE='''' Where NOTE is NULL',@whereand=' AND o.name in (''Table1'',''Table2'',''Table3'')'

45 5)"?"在存储过程的特殊用法,造就了这两个功能强大的存储过程

46 这里"?"的作用,相当于DOS命令中、以及我们在WINDOWS下搜索文件时的通配符的作用。

print '打印所有需要清空的表:'

exec sp_msforeachtable @command1="print '?'",

@whereand=' and (o.[name] like ''YDS_%'' or o.[name] like ''FKS_%'')'

print '---------------------------------------------------------------------'

print '打印没有外键约束的表:'

exec sp_msforeachtable @command1="print '?'",

@whereand=' and objectproperty(o.id,''TableHasForeignRef'')=0 and xtype=''u'' and (o.[name] like ''YDS_%'' or o.[name] like ''SGCB_%'' or o.[name] like ''YDZY_%'' or o.[name] like ''Document_%'')'

--清空没有外键约束的表

exec sp_msforeachtable @command1="truncate table ?",

@whereand=' and objectproperty(o.id,''TableHasForeignRef'')=0 and xtype=''u'' and (o.[name] like ''YDS_%'' or o.[name] like ''SGCB_%'' or o.[name] like ''YDZY_%'' or o.[name] like ''Document_%'')'

print '---------------------------------------------------------------------'

truncate table CHZL_XX

truncate table BookMarks

print '打印有外键约束的表:'

exec sp_msforeachtable @command1="print '?'",

@whereand=' and objectproperty(o.id,''TableHasForeignRef'')=1 and xtype=''u'' and (o.[name] like ''YDS_%'' or o.[name] like ''SGCB_%'' or o.[name] like ''YDZY_%'' or o.[name] like ''Document_%'')'

--清空有外键约束的表

exec sp_msforeachtable @command1="delete from ?",

@whereand=' and objectproperty(o.id,''TableHasForeignRef'')=1 and xtype=''u'' and (o.[name] like ''YDS_%'' or o.[name] like ''SGCB_%'' or o.[name] like ''YDZY_%'' or o.[name] like ''Document_%'')'

print '---------------------------------------------------------------------'

print '重置MaxIDs表:'

--重置MaxIDs表

update MaxIDs set MaxID=1

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