遍历替换整个数据库中所有用户表的字段中的数据

DECLARE @table_name sysname
DECLARE @table_id int
DECLARE @strSource varchar(20),@strDest varchar(20)
set @strSource='Source --要替换掉的字符串
set @strDest='Dest' --用来替换的字符串

-- 获得所有User表
DECLARE tables_cursor CURSOR FOR select name,id from sysobjects where xtype='U'

OPEN tables_cursor

-- Perform the first fetch
FETCH NEXT FROM tables_cursor INTO @table_name,@table_id

-- Check @@FETCH_STATUS to see if there are any more rows to fetch.
WHILE @@FETCH_STATUS = 0
BEGIN

-- 获取表的文本类型字段
-- 'char','nchar','varchar','nvarchar','ntext','text'
DECLARE columns_cursor CURSOR FOR select name from syscolumns where id=@table_id and xtype in (select xtype from systypes where name='varchar')
DECLARE @column_name varchar(255)

OPEN columns_cursor

FETCH NEXT FROM columns_cursor INTO @column_name
WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @cmd varchar(8000)

-- 遍历表@table_name的每条记录的字段@column_name，更新该字段的内容
-- 动态生成执行语句
SET @cmd='
DECLARE @str_value varchar(8000)
DECLARE recorder_cursor CURSOR FOR select '+@column_name+' from '+@table_name+'
OPEN recorder_cursor
FETCH NEXT FROM recorder_cursor INTO @str_value
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT REPLACE(@str_value,'''+@strSource+''','''+@strDest+''')
UPDATE '+@table_name+' SET '+@column_name+'=@str_value WHERE CURRENT OF recorder_cursor

FETCH NEXT FROM recorder_cursor INTO @str_value
END
CLOSE recorder_cursor
DEALLOCATE recorder_cursor'

Print @cmd
--EXEC sp_executesql @cmd

FETCH NEXT FROM columns_cursor INTO @column_name
END


CLOSE columns_cursor
DEALLOCATE columns_cursor

-- This is executed as long as the previous fetch succeeds.
FETCH NEXT FROM tables_cursor INTO @table_name,@table_id
END

CLOSE tables_cursor
DEALLOCATE tables_cursor


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csdn会员 zjcxc（邹建）

--1.替换一个表中的所有字段中的ABC为123

declare @s nvarchar(4000),@tbname sysname
select @s=N'',@tbname=N'jobs' --要处理的表名
select @s=@s+N','+quotename(a.name)+N'=replace('+quotename(a.name)+N',N''ABC'',N''123'')'
from syscolumns a,systypes b
where a.id=object_id(@tbname)
and a.xusertype=b.xusertype
and b.name like N'%char'
set @s=stuff(@s,1,1,N'')
exec(N'update '+@tbname+' set '+@s)

--2.替换当前数据库的所有表中的所有字段中的ABC为123
exec sp_msforeachtable @command1=N'
declare @s nvarchar(4000),@tbname sysname
select @s=N'''',@tbname=N''?''
select @s=@s+N'',''+quotename(a.name)+N''=replace(''+quotename(a.name)+N'',N''''ABC'''',N''''123'''')''
from syscolumns a,systypes b
where a.id=object_id(@tbname)
and a.xusertype=b.xusertype
and b.name like N''%char''
if @@rowcount>0
begin
set @s=stuff(@s,1,1,N'''')
exec(N''update ''+@tbname+'' set ''+@s)
end'
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csdn会员 chuifengde(树上的鸟儿)

create proc procTab
@table varchar(100)
as
declare @t table(a int,b varchar(20))
declare @a varchar(1000)

insert @t select distinct b.colid, b.name from sysobjects a Inner Join syscolumns b On a.id=b.id Inner Join systypes c On b.xtype=c.xtype
where a.id=object_id(@table) and a.xtype='U' and c.xtype in(34,35,99,167,175,231,239) order by b.colid

select @a=coalesce(@a+',','')+b+'=isnull('+b+','''')' from @t
select @a='update '+@table+' set '+@a

exec(@a)

go
--如果更新整个库中的表则如下
sp_msforeachtable 'exec procTab ''?'' '
--更新某个表就
exec procTab '表名'
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