替换SQL Server数据库中所有表的所有字段的某些内容

方法一：

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''''aa'''',N''''bb'''')''

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'


方法二：

declare @t varchar(255),@c varchar(255)

declare table_cursor cursor for

select a.name,b.name from sysobjects a,syscolumns b ,systypes c

where a.id=b.id and a.xtype='u' and c.name in (--这里是要替换的类型

'char', 'nchar', 'nvarchar', 'varchar','text','ntext' --这里如果你的text(ntext)类型没有超过8000(4000)长度，才可以使用

)

declare @str varchar(500),@str2 varchar(500)

--这里是你要替换的原字符

set @str='aa'

--这里是你要替换的新字符

set @str2='bb'

open table_cursor fetch next from table_cursor into @t,@c

while(@@fetch_status=0)

begin

exec('update [' + @t + '] set [' + @c + ']=replace(cast([' + @c + '] as varchar(8000)),'''+@str+''','''+ @str2 +''')')

fetch next from table_cursor into @t,@c

end

close table_cursor

deallocate table_cursor;