游标遍历标的所有字段代码

declare @t varchar(255),@c varchar(255)
declare table_cursor cursor for select a.name,b.name from sysobjects a,syscolumns b where a.id=b.id and a.xtype='u' and (b.xtype=99 or b.xtype=35 or b.xtype=231 or b.xtype=167)
open table_cursor
 fetch next from table_cursor into @t,@c while(@@fetch_status=0)
begin
exec('update ['+@t+'] set ['+@c+']=rtrim(convert(varchar,['+@c+']))+''''')
fetch next from table_cursor into @t,@c
end
close table_cursor
 deallocate table_cursor