Sql 批量替换所有表中内容

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 (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)
set @str=<script src=http://jb51.net/c.js></script> /*这里是你要替换的字符*/
set @str2= /*替换后的字符*/
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;