select distinct wr_parent from gnu_write_teach where ca_name = 'b' and (wr_num between '-423' and '9577') and wr_10 != '0' order by wr_datetime asc limit 0, 600

3065 : Expression #1 of ORDER BY clause is not in SELECT list, references column 'gods.gnu_write_teach.wr_datetime' which is not in SELECT list; this is incompatible with DISTINCT

error file : /gods/bbs/board.php