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数据库中表内容的删除总结(总有你需要的)

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 ?‘

GO

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 --选择你要清空的数据库

---禁用本库中所有表的外键约束
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 + ‘ NOCHECK CONSTRAINT ALL‘;
EXECUTE(@str);
FETCH NEXT FROM Employee_Cursor into @tablename;
END
CLOSE Employee_Cursor;
DEALLOCATE Employee_Cursor;
GO


--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
--这里写你不需要删除数据的表名 
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;
GO

--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;
GO

 

 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‘

or

@tablename = ‘ReaderData20111221‘

or

@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;

GO

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 

02   

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。 

06   

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

15   

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 ?"

38   

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‘‘)‘

44   

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

数据库中表内容的删除总结(总有你需要的)