第一种写法:
select t.tj_agid, t.tj_fwork_ym from tbl_dcs_jyyc_rpt t, (select tj_agid, max(tj_ym) maxym from tbl_dcs_jyyc_rpt where tj_ismanager = '1' group by tj_agid) k where t.tj_ym = k.maxym and t.tj_agid = k.tj_agid and t.tj_ismanager = '1' and t.tj_fwork_ym is not null;
第二种写法(更好的写法,只扫描一次表)
select t1.tj_agid, t1.tj_fwork_ym from (select t.tj_agid, t.tj_fwork_ym, row_number() over(partition by t.tj_agid order by t.tj_upddate desc) as seq from tbl_dcs_jyyc_rpt t where t.tj_ismanager = '1') t1 where t1.seq = 1 and t1.tj_fwork_ym is not null