摘要:
更新 mysql> create trigger t2 -> after -> insert on ord -> for each row -> begin update goods set num=num-new.mch where gid = new.gid; -> end$Query OK, 阅读全文
摘要:
报错如下: ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'tmp.goods_id' which is not functio 阅读全文