关于SQLite数据库的作业 2

Posted 2020-07-16

1查询Student表中的所有记录的Sname、Ssex和Class列。

SELECT sname,ssex,class from Student

2查询教师所有的单位即不重复的Depart列。

SELECT Depart from Teachear

3查询Student表的所有记录。

SELECT * from Student

4查询Score表中成绩在60到80之间的所有记录。

SELECT degree from Score where Degree>60 and Degree<80

5查询Score表中成绩为85，86或88的记录。

SELECT Degree from Score WHERE Degree=85 OR Degree=86 or Degree=88

6查询Student表中“95031”班或性别为“女”的同学记录。

SELECT * FROM Student WHERE Ssex=‘女‘AND Class=‘95031‘

SELECT * FROM Student WHERE Ssex=‘女‘OR Class=‘95031‘

7以Class降序查询Student表的所有记录。

SELECT * FROM Student ORDER BY class DESC

8以Cno升序、Degree降序查询Score表的所有记录。

升序：SELECT *from Score ORDER BY degree ASC

降序：SELECT *from Score ORDER BY degree DESC

9查询“95031”班的学生人数。

SELECT * FROM Student WHERE Class=‘95031‘