摘要: 中间表命名规则insert into statistic(productid,in_gross)( select db.productid db.sa from(select productid,sum(amount) sa from supply GROUP BY productid) db); 阅读全文
posted @ 2021-09-11 09:32 LYOUNG_l 阅读(214) 评论(0) 推荐(0)