摘要：闪回2013-08-08 08:08:08的数据： insert into table_1 select * from table_2as of timestamp to_date('2013-08-08 08:08:08','yyyy-mm-dd hh24:mi:ss'); 阅读全文

摘要：select count(1), t.col_a from table_test t group by t.col_a having count(t.col_a)>1; 阅读全文

摘要：http://wpa.qq.com/msgrd?v=3&uin=88888888&site=qq&menu=yes 阅读全文