检索选修了全部课程的学生姓名
时间: 2023-11-24 11:52:11 浏览: 152
以下是检索选修了全部课程的学生姓名的SQL语句:
```
SELECT Sname FROM Student
WHERE NOT EXISTS (
SELECT * FROM Course
WHERE NOT EXISTS (
SELECT * FROM SC
WHERE Sno=Student.Sno AND Cno=Course.Cno
)
);
```
该SQL语句使用了两个嵌套的`NOT EXISTS`子查询,通过判断学生选课表SC中是否存在某个学生选了某个课程,从而筛选出选修了全部课程的学生。如果一个学生没有选全部的课程,那么他就不会被输出出来。
相关问题
根据上面的对话检索“程军”老师所授课程的课程号和课程名。 (3)检索年龄大于19岁男学生的学号和姓名。 (4)检索“李勇”同学不学课程的课程号。 (5)检索至少选修两门课程的学生学号。 (6)检索选修课程号为1和2的学生学号。 (7)检索至少选修“程军”老师所授全部课程的学生姓名。 (8)检索选修课程包含学号为201215122的学生所修课程的学生学号。 (9)检索全部学生都选修的课程的课程号和课程名。 (10)检索选修全部课程的学生姓名。 (11)查询所在系是CS系的学生选修的课程的课程名和学分,结果按课程名降序排序。 (12)检索“数据库”课程成绩高于90分的所有学生的学号、姓名和分数. (13)查询男生和女生选修课程的平均成绩。 (14)检索没有选课的学生的学号和姓名。 (15)检索没有任何一门课程成绩不及格的学生的信息,包括学号、姓名
很抱歉,作为语言模型,我不能直接连接数据库进行数据检索。但是,我可以提供一些 SQL 查询语句的示例,您可以根据这些示例进行相应的查询操作:
1. 检索“程军”老师所授课程的课程号和课程名:
```
SELECT Cno, Cname
FROM Course
WHERE Cpno IN (SELECT Cno FROM Course WHERE Cname = '程军');
```
2. 检索年龄大于19岁男学生的学号和姓名:
```
SELECT Sno, Sname
FROM Student
WHERE Ssex = '男' AND Sage > 19;
```
3. 检索“李勇”同学不学课程的课程号:
```
SELECT Cno
FROM Course
WHERE Cno NOT IN (SELECT Cno FROM SC WHERE Sno = (SELECT Sno FROM Student WHERE Sname = '李勇'));
```
4. 检索至少选修两门课程的学生学号:
```
SELECT Sno
FROM SC
GROUP BY Sno
HAVING COUNT(*) >= 2;
```
5. 检索选修课程号为1和2的学生学号:
```
SELECT Sno
FROM SC
WHERE Cno IN ('1', '2');
```
6. 检索至少选修“程军”老师所授全部课程的学生姓名:
```
SELECT Sname
FROM Student
WHERE Sno IN (SELECT Sno FROM SC WHERE Cno IN (SELECT Cno FROM Course WHERE Cpno IN (SELECT Cno FROM Course WHERE Cname = '程军'))
GROUP BY Sno
HAVING COUNT(*) = (SELECT COUNT(*) FROM Course WHERE Cpno IN (SELECT Cno FROM Course WHERE Cname = '程军')));
```
7. 检索选修课程包含学号为201215122的学生所修课程的学生学号:
```
SELECT DISTINCT Sno
FROM SC
WHERE Cno IN (SELECT Cno FROM SC WHERE Sno = '201215122');
```
8. 检索全部学生都选修的课程的课程号和课程名:
```
SELECT Cno, Cname
FROM Course
WHERE Cno IN (SELECT Cno FROM SC GROUP BY Cno HAVING COUNT(*) = (SELECT COUNT(*) FROM Student));
```
9. 检索选修全部课程的学生姓名:
```
SELECT Sname
FROM Student
WHERE Sno IN (SELECT Sno FROM SC GROUP BY Sno HAVING COUNT(*) = (SELECT COUNT(*) FROM Course));
```
10. 查询所在系是CS系的学生选修的课程的课程名和学分,结果按课程名降序排序:
```
SELECT C.Cname, C.Ccreadit
FROM SC AS S
JOIN Course AS C ON S.Cno = C.Cno
JOIN Student AS St ON S.Sno = St.Sno
WHERE St.Sdept = 'CS'
ORDER BY C.Cname DESC;
```
11. 检索“数据库”课程成绩高于90分的所有学生的学号、姓名和分数:
```
SELECT S.Sno, S.Sname, SC.Grade
FROM Student AS S
JOIN SC ON S.Sno = SC.Sno
JOIN Course AS C ON SC.Cno = C.Cno
WHERE C.Cname = '数据库' AND SC.Grade > 90;
```
12. 查询男生和女生选修课程的平均成绩:
```
SELECT S.Ssex, AVG(SC.Grade) AS AvgGrade
FROM Student AS S
JOIN SC ON S.Sno = SC.Sno
GROUP BY S.Ssex;
```
13. 检索没有选课的学生的学号和姓名:
```
SELECT S.Sno, S.Sname
FROM Student AS S
WHERE S.Sno NOT IN (SELECT Sno FROM SC);
```
14. 检索没有任何一门课程成绩不及格的学生的信息,包括学号、姓名:
```
SELECT S.Sno, S.Sname
FROM Student AS S
WHERE S.Sno NOT IN (SELECT Sno FROM SC WHERE Grade < 60);
```
检索选修计算机开设的全部课程的学生姓名mysql
对于这个问题,我们需要知道选修计算机开设的全部课程的课程编号。假设这些课程的编号为001、002、003等。那么我们可以通过以下的SQL语句来查询选修了这些课程的学生姓名:
```
SELECT DISTINCT s.name
FROM student AS s, course AS c, sc
WHERE s.sno = sc.sno
AND c.cno = sc.cno
AND c.cno IN ('001', '002', '003')
```
其中,student、course、sc分别是学生、课程、选课表的表名,sno和cno分别是学生编号和课程编号的字段名。我们使用了INNER JOIN来连接这三个表,同时使用了IN来筛选选修了指定课程的学生。最后使用DISTINCT来去重,以免出现一个学生选修了多门课程的情况。
阅读全文