摘要: ##(2.3)查询学号是S_1001,S_1002,S_1003的记录 写法一:select * from stu where sid = 'S_1001' or sid = 'S_1002' or sid = 'S_1003';写法二:select * from stu where sid in 阅读全文
posted @ 2021-04-12 09:01 啊阿啊 阅读(129) 评论(0) 推荐(0)