group by 函数的使用
摘要:
select a.product_code, a.oper_id from t_product_trajectory a /* where a.product_code = '123' and a.oper_id = '22'*/ group by a.product_code, a.oper_id 阅读全文
posted @ 2020-03-15 19:41 ~码铃薯~ 阅读(149) 评论(0) 推荐(0) 编辑