如上有subject课程表和result成绩表,要求用查询IN方法查询具体内容
题1:查询《数据库结构-1》的所有考试结果,并按成绩由高到低排列
SELECT studentNo, studentResult FROM result WHERE
subjectNoIN (SELECT subjectNo FROM
subjectWHERE subjectName='数据库结构-1') ORDER BY studentResult DESC;
本题中,虽然有用到两张表subject表和result表,但是查询结果studentNo、studentResult 都只要从result表中获取,所以不用加上subject.subjectNo=result.subjectNo.