SELECT * FROM `stu` s  ORDER BY s.stu_age DESC;


SELECT * FROM `stu` s  WHERE  s.stu_name LIKE '%王%';


SELECT * FROM `stu` s  WHERE  s.stu_sal>5000 AND s.stu_sex='男';


SELECT *,s.stu_phone FROM `stu` s  WHERE  s.stu_classId=20 AND s.stu_sex='男';


SELECT *,MIN(s.stu_sal) FROM `stu` s  ;


SELECT *,MIN(s.stu_age) FROM `stu` s WHERE s.stu_classId=30;

SELECT *,MIN(s.stu_sal) FROM `stu` s WHERE s.stu_sex='女';