让阿豪来帮你解答,本回答参考chatgpt3.5编写提供,如果还有疑问可以评论或留言(1) SELECT s.Name, s.Sex, c.ClassName FROM Stu s INNER JOIN Class c ON s.ClassNo = c.ClassNo WHERE s.Address = '湖南省' (2) SELECT c.ClassName, COUNT(*) AS '人数' FROM Stu s INNER JOIN Class c ON s.ClassNo = c.ClassNo GROUP BY c.ClassName HAVING COUNT(*) >= 30 (3) SELECT s.StuNo, s.Name, c.ClassName, s.Phone FROM Score sc INNER JOIN Stu s ON sc.StuNo = s.StuNo INNER JOIN Class c ON s.ClassNo = c.ClassNo WHERE sc.Score >= 95 (4) SELECT s.StuNo, s.Name, c.CourseName, sc.Score FROM Score sc INNER JOIN Stu s ON sc.StuNo = s.StuNo INNER JOIN Course c ON sc.CourseNo = c.CourseNo WHERE s.Sex = '女' AND sc.Score IS NOT NULL
