摘要: sql 常用语句用法 --子查询用法 select s#,sname from student where s# in(select s# from sc ) --in查询用法(in:满足,not in :不满足) select s#,sname from student where s# not 阅读全文
posted @ 2021-02-03 14:42 听见你的声音、潇 阅读(132) 评论(0) 推荐(0) 编辑