各位大神，小白请教SQL数据库问题，这题目应该怎么做？
1 select dh from td_ls_1 where Id_hyk >0
3 delete dh from td_ls_1 a inner join td_ls_2 b on a.dh = b.dh where a.Ymd_rz = 20110529
4 select je_hs from td_ls_2 group by je_hs order by desc;
供参考
1 select dh from td_ls_1 where Id_hyk >0
3 delete dh from td_ls_1 a inner join td_ls_2 b on a.dh = b.dh where a.Ymd_rz = 20110529
4 select je_hs from td_ls_2 group by je_hs order by desc;
供参考