SQL查詢筆記（行轉列）

有兩張表 1.查詢所有性別的同學成績都爲優 select name, subject, scope, case sex when 1 then ‘男’ when 2 then ‘女’ else ‘其它’ end sex, ‘優’ level from test left join student on test.student_id=student.id 2.查詢各成績段顯示的級別 select

>>阅读原文<<