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=fasfdasfasf ></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,