| 这个作业属于哪个课程 | https://edu.cnblogs.com/campus/uzz/cs3 |
|---|---|
| 这个作业要求在哪里 | https://edu.cnblogs.com/campus/uzz/cs3/homework/13041 |
| 这个作业的目标 | 第2次作业-SQL语句的基本使用 |
mysql> create database studentsdb;
Query OK, 1 row affected (0.00 sec)
mysql> use studentsdb;
Database changed
mysql> create table student_info (学号 char(4) primary key not null,
姓名 char(8),
性别 char(2),
出生日期 date,
家族住址 varchar(50));
Query OK, 0 rows affected (0.01 sec)
mysql> create table curriculum (课程编号 char(4) primary key not null,
课程名称 varchar(50),
学分 int
);
Query OK, 0 rows affected (0.01 sec)
mysql> create table grade (学号 char(4) not null,
课程编号 char(4) not null, primary key(学号,课程编号),
分数 int
);
Query OK, 0 rows affected (0.01 sec)
mysql> desc student_info;
+---------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| 学号 | char(4) | NO | PRI | NULL | |
| 姓名 | char(8) | YES | | NULL | |
| 性别 | char(2) | YES | | NULL | |
| 出生日期 | date | YES | | NULL | |
| 家族住址 | varchar(50) | YES | | NULL | |
+---------+-------------+------+-----+---------+-------+
5 rows in set (0.06 sec)
mysql> desc curriculum;
+---------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| 课程编号 | char(4) | NO | PRI | NULL | |
| 课程名称 | varchar(50) | YES | | NULL | |
| 学分 | int | YES | | NULL | |
+---------+-------------+------+-----+---------+-------+
3 rows in set (0.05 sec)
mysql> desc grade;
+---------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+---------+------+-----+---------+-------+
| 学号 | char(4) | NO | PRI | NULL | |
| 课程编号 | char(4) | NO | PRI | NULL | |
| 分数 | int | YES | | NULL | |
+---------+---------+------+-----+---------+-------+
3 rows in set (0.05 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0001','张青平','男','2000-10-01','衡阳市东风路77号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0002','刘东阳','男','1998-12-09','东阳市八一北路33号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0003','马晓夏','女','1995-05-12 ','长岭市五一路763号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0004','钱忠理','男','1994-09-23','滨海市洞庭大道279号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0005','孙海洋','男','1995-04-03','长岛市解放路27号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0006','郭小斌','男','1997-11-10','南山市红旗路113号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0007','肖月玲','女','1996-12-07','东方市南京路11号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into student_info (学号,姓名,性别,出生日期,家族住址) values ('0008','张玲珑','女','1997-12-24','滨江市新建路97号');
Query OK, 1 row affected (0.00 sec)
mysql> insert into curriculum (课程编号,课程名称,学分) values ('0001','计算机应用基础','2');
Query OK, 1 row affected (0.00 sec)
mysql> insert into curriculum (课程编号,课程名称,学分) values ('0002','C语言程序设计','2');
Query OK, 1 row affected (0.00 sec)
mysql> insert into curriculum (课程编号,课程名称,学分) values ('0003','数据库原理及应用','2');
Query OK, 1 row affected (0.00 sec)
mysql> insert into curriculum (课程编号,课程名称,学分) values ('0004','英语','4');
Query OK, 1 row affected (0.00 sec)
mysql> insert into curriculum (课程编号,课程名称,学分) values ('0005','高等数学','4');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0001','0001','80');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0001','0002','91');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0001','0003','88');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0001','0004','85');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0001','0005','77');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0002','0001','73');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0002','0002','68');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0002','0003','80');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0002','0004','79');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0002','0005','73');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0003','0001','84');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0003','0002','92');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0003','0003','81');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0003','0004','82');
Query OK, 1 row affected (0.00 sec)
mysql> insert into grade (学号,课程编号,分数) values ('0003','0005','75');
Query OK, 1 row affected (0.00 sec)
mysql> select * from grade;
+------+---------+------+
| 学号 | 课程编号 | 分数 |
+------+---------+------+
| 0001 | 0001 | 80 |
| 0001 | 0002 | 91 |
| 0001 | 0003 | 88 |
| 0001 | 0004 | 85 |
| 0001 | 0005 | 77 |
| 0002 | 0001 | 73 |
| 0002 | 0002 | 68 |
| 0002 | 0003 | 80 |
| 0002 | 0004 | 79 |
| 0002 | 0005 | 73 |
| 0003 | 0001 | 84 |
| 0003 | 0002 | 92 |
| 0003 | 0003 | 81 |
| 0003 | 0004 | 82 |
| 0003 | 0005 | 75 |
+------+---------+------+
15 rows in set (0.05 sec)
mysql> select * from curriculum;
+---------+----------------+------+
| 课程编号 | 课程名称 | 学分 |
+---------+----------------+------+
| 0001 | 计算机应用基础 | 2 |
| 0002 | C语言程序设计 | 2 |
| 0003 | 数据库原理及应用 | 2 |
| 0004 | 英语 | 4 |
| 0005 | 高等数学 | 4 |
+---------+----------------+------+
5 rows in set (0.04 sec)
mysql> select * from student_info;
+------+--------+------+------------+-------------------+
| 学号 | 姓名 | 性别 | 出生日期 | 家族住址 |
+------+--------+------+------------+-------------------+
| 0001 | 张青平 | 男 | 2000-10-01 | 衡阳市东风路77号 |
| 0002 | 刘东阳 | 男 | 1998-12-09 | 东阳市八一北路33号 |
| 0003 | 马晓夏 | 女 | 1995-05-12 | 长岭市五一路763号 |
| 0004 | 钱忠理 | 男 | 1994-09-23 | 滨海市洞庭大道279号 |
| 0005 | 孙海洋 | 男 | 1995-04-03 | 长岛市解放路27号 |
| 0006 | 郭小斌 | 男 | 1997-11-10 | 南山市红旗路113号 |
| 0007 | 肖月玲 | 女 | 1996-12-07 | 东方市南京路11号 |
| 0008 | 张玲珑 | 女 | 1997-12-24 | 滨江市新建路97号 |
+------+--------+------+------------+-------------------+
8 rows in set (0.05 sec)
