第2次作业-SQL语句的基本使用

mysql> use studentsdb;
Database changed
mysql> show tables;
+--------------------+
| Tables_in_studentsdb |
+--------------------+
| curriculum |
| grade |
| student_info |
+--------------------+
3 rows in set (0.02 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'),
('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');
Query OK, 8 rows affected (0.33 sec)
Records: 8 Duplicates: 0 Warnings: 0

mysql> desc student_info;
+----------+------------+------+------+--------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+------------+------+------+--------+-------+
| 学号 | char(4) | NO | PRI | NULL | |
| 姓名 | char(8) | NO | | 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 (0.08 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 (0.11 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 (0.08 sec)

mysql> create table curriculum
-> (课程编号 char(4) not null,
-> 课程名称 varchar(50),
-> 学分 int,
-> primary key(课程编号));
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-> 课程名称 varchar(50),
-> 学分 int,
-> primary key(课程编å' at line 3
mysql> create table curriculum
-> values （"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);
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '（"0001","计算机应用基础",2）,
("0002","C语言程序设计",2),
("00' at line 2
mysql> create table curriculum
-> (课程编号 char(4) not null,
-> 课程名称 varchar(50),
-> 学分 int,
-> primary key(课程编号));
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-> 课程名称 varchar(50),
-> 学分 int,
-> primary key(课程编å' at line 3
mysql> create table curriculum
-> (课程编号 char(4) not null,
-> 课程名称 varchar(50),
-> 学分 int,
-> primary key(课程编号));
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-> 课程名称 varchar(50),
-> 学分 int,
primary key(课程编号))' at line 3
mysql> insert into curriculum(课程编号,课程名称,学分)
-> VALUES('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);
Query OK, 5 rows affected (0.01 sec)
Records: 5 Duplicates: 0 Warnings: 0

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 (0.10 sec)

mysql> INSERT INTO grade(学号,课程编号,分数)
-> VALUES('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);
1062 - Duplicate entry '0001-0001' for key 'grade.PRIMARY'
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 (0.10 sec)

mysql>