查询重复记录或删除多余重复记录

下面以流水表作为例子。

查询重复记录：

select t.*,t.rowid from cmbcproxy_app_trans t where t.appseqid in
(select b.appseqid from cmbcproxy_app_trans b group by b.appseqid having count(b.appseqid)>1)

删除重复记录保留rowid最小的：

delete from cmbcproxy_app_trans t where t.appseqid in
(select b.appseqid from cmbcproxy_app_trans b group by b.appseqid having count(b.appseqid)>1)
and t.rowid not in
(select min(c.rowid) from cmbcproxy_app_trans c group by c.appseqid having count(c.appseqid)>1)