1、终端操作MySQL数据库
1.1如何登陆数据库服务器：
C:Usersusername>mysql -uroot -proot
1.2如何查询数据库服务器中的数据库
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| test1 |
+--------------------+
5 rows in set (0.03 sec)1.3如何选中某一个数据库进行操作
mysql> use test1
Database changed1.4SQL语句中的查询
mysql> select * from person;
+-----------+------+
| name | sex |
+-----------+------+
| 张三 | 男 |
| 李四 | 女 |
| 王麻子 | 男 |
+-----------+------+
3 rows in set (0.00 sec)
mysql> select * from person where name="张三";
+--------+------+
| name | sex |
+--------+------+
| 张三 | 男 |
+--------+------+
1 row in set (0.00 sec)1.5如何退出数据库服务器
mysql> exit;
Bye 2、如何创建数据库数据表
2.1如何在数据库服务器中创建我们的数据库
mysql> create database test2;
Query OK, 1 row affected (0.05 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| test1 |
| test2 |
+--------------------+
6 rows in set (0.00 sec)
mysql> use test2;
Database changed2.2如何查看某个数据库中的所有数据表
mysql> show tables;
Empty set (0.00 sec)2.3如何创建一个数据表
mysql> create table pet(
-> name VARCHAR(20),
-> owner VARCHAR(20),
-> species VARCHAR(20),
-> sex CHAR(1),
-> birth DATE,
-> death DATE);
Query OK, 0 rows affected (0.09 sec)创建了一个宠物数据表
查看数据表是否创建成功
mysql> show tables;
+-----------------+
| Tables_in_test2 |
+-----------------+
| pet |
+-----------------+
1 row in set (0.00 sec)2.4查看创建好的数据表的结构
mysql> describe pet;
+---------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| name | varchar(20) | YES | | NULL | |
| owner | varchar(20) | YES | | NULL | |
| species | varchar(20) | YES | | NULL | |
| sex | char(1) | YES | | NULL | |
| birth | date | YES | | NULL | |
| death | date | YES | | NULL | |
+---------+-------------+------+-----+---------+-------+
6 rows in set (0.00 sec)
3、insert增加数据记录
3.1查看数据表中的记录
mysql> select * from pet;
Empty set (0.00 sec)3.2如何往数据表中添加数据记录
mysql> insert into pet
-> values('Tom','LiMing','hamster','f','2020-11-11',null);
Query OK, 1 row affected (0.01 sec)再一次查询
mysql> select * from pet;
+------+--------+---------+------+------------+-------+
| name | owner | species | sex | birth | death |
+------+--------+---------+------+------------+-------+
| Tom | LiMing | hamster | f | 2020-11-11 | NULL |
+------+--------+---------+------+------------+-------+
1 row in set (0.00 sec)mysql> insert into pet
-> values('旺财','周星星','狗','公','2020-11-11',null);
Query OK, 1 row affected (0.01 sec)查看
mysql> select * from pet;
+--------+-----------+---------+------+------------+-------+
| name | owner | species | sex | birth | death |
+--------+-----------+---------+------+------------+-------+
| Tom | LiMing | hamster | f | 2020-11-11 | NULL |
| 旺财 | 周星星 | 狗 | 公 | 2020-11-11 | NULL |
+--------+-----------+---------+------+------------+-------+
2 rows in set (0.00 sec)3.3MySQL常用数据类型
MySQL支持多种类型，大致可以分为三类：数值、日期/时间和字符串(字符)类型。
3.3.1数值类型
如果数值超出数值类型的范围就会报错：
mysql> create table testType(
-> number tinyint);
Query OK, 0 rows affected (0.10 sec)
mysql> describe testType;
+--------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------+---------+------+-----+---------+-------+
| number | tinyint | YES | | NULL | |
+--------+---------+------+-----+---------+-------+
1 row in set (0.00 sec)
mysql> insert into testType
-> values(128);
ERROR 1264 (22003): Out of range value for column 'number' at row 1
3.3.2日期和时间类型
3.3.3字符串类型
3.3.4数据类型如何选择
日期：按照日期格式
数值和字符串：按照大小
4、数据记录增删查改操作
4.1插入：
mysql> insert into pet values('Buffy','Job','cat','m','2020-11-10',null);
Query OK, 1 row affected (0.01 sec)
mysql> insert into pet values('Slim','邓紫棋','dog','f','2019-11-11',null);
Query OK, 1 row affected (0.01 sec)
mysql> insert into pet
-> values('Fang','成龙','cat','m','2018-11-11','2020-10-10');
Query OK, 1 row affected (0.01 sec)
mysql> select * from pet;
+--------+-----------+---------+------+------------+------------+
| name | owner | species | sex | birth | death |
+--------+-----------+---------+------+------------+------------+
| Tom | LiMing | hamster | f | 2020-11-11 | NULL |
| 旺财 | 周星星 | 狗 | 公 | 2020-11-11 | NULL |
| Buffy | Job | cat | m | 2020-11-10 | NULL |
| Slim | 邓紫棋 | dog | f | 2019-11-11 | NULL |
| Fang | 成龙 | cat | m | 2018-11-11 | 2020-10-10 |
+--------+-----------+---------+------+------------+------------+
5 rows in set (0.00 sec)
4.2如何删除数据
mysql> delete from pet where name='Tom';
Query OK, 1 row affected (0.01 sec)再次查看
mysql> select * from pet;
+--------+-----------+---------+------+------------+------------+
| name | owner | species | sex | birth | death |
+--------+-----------+---------+------+------------+------------+
| 旺财 | 周星星 | 狗 | 公 | 2020-11-11 | NULL |
| Buffy | Job | cat | m | 2020-11-10 | NULL |
| Slim | 邓紫棋 | dog | f | 2019-11-11 | NULL |
| Fang | 成龙 | cat | m | 2018-11-11 | 2020-10-10 |
+--------+-----------+---------+------+------------+------------+
4 rows in set (0.00 sec)4.3如何修改数据
mysql> update pet set name='旺财财' where owner='周星星';
Query OK, 1 row affected (0.01 sec)
再次查看：
mysql> select * from pet;
+-----------+-----------+---------+------+------------+------------+
| name | owner | species | sex | birth | death |
+-----------+-----------+---------+------+------------+------------+
| 旺财财 | 周星星 | 狗 | 公 | 2020-11-11 | NULL |
| Buffy | Job | cat | m | 2020-11-10 | NULL |
| Slim | 邓紫棋 | dog | f | 2019-11-11 | NULL |
| Fang | 成龙 | cat | m | 2018-11-11 | 2020-10-10 |
+-----------+-----------+---------+------+------------+------------+
4 rows in set (0.00 sec)4.4总结：数据记录常见操作
增加：insert
删除：delete
修改：update
查询：select
5、MySQL建表约束
5.1主键约束 primary key
它能够唯一确定一张表中的一条记录，也就是我们通过给某个字段添加约束，就可以使得该字段不重复且不为空。
mysql> create table user(
-> id int primary key,
-> name varchar(20));
Query OK, 0 rows affected (0.08 sec)
mysql> describe user;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | NO | PRI | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)再次插入id=1的记录
mysql> insert into user values(1,'李四');
ERROR 1062 (23000): Duplicate entry '1' for key 'user.PRIMARY'id为空的时候
mysql> insert into user values(null,'李四');
ERROR 1048 (23000): Column 'id' cannot be null
5.2联合主键
mysql> create table user2(
-> id int,
-> name varchar(20),
-> password varchar(20),
-> primary key(id,name)
-> );
Query OK, 0 rows affected (0.06 sec)插入记录
mysql> insert into user2 values(1,'zhangsan','123');
Query OK, 1 row affected (0.01 sec)
mysql> insert into user2 values(1,'zhangsan','234');
ERROR 1062 (23000): Duplicate entry '1-zhangsan' for key 'user2.PRIMARY'
mysql> insert into user2 values(2,'zhangsan','234');
Query OK, 1 row affected (0.01 sec)联合主键只要主键字段之间加起来不重复就可以，但任何一个主键字段都不可以为空。
5.3自增约束auto_increment
mysql> create table user3(
-> id int primary key auto_increment,
-> name varchar(20)
-> );
Query OK, 0 rows affected (0.05 sec)插入数据
mysql> insert into user3 (name) values('zhangsan');
Query OK, 1 row affected (0.01 sec)
查看
mysql> select * from user3;
+----+----------+
| id | name |
+----+----------+
| 1 | zhangsan |
+----+----------+
1 row in set (0.00 sec)自增约束和主键约束搭配在一起使用时，它会自动给我们管去控值，例如：自动增加id。
5.4如果创建表的时候忘记创建主键约束怎么办？
mysql> create table user4(
-> id int,
-> name varchar(20));
Query OK, 0 rows affected (0.06 sec)
mysql> desc user4;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | YES | | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)修改表结构，增加主键约束 alter ... add
mysql> alter table user4 add primary key(id);
Query OK, 0 rows affected (0.12 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> desc user4;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | NO | PRI | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)如何删除呢？alter ...drop
mysql> alter table user4 drop primary key;
Query OK, 0 rows affected (0.10 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> desc user4;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | NO | | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)使用modify，修改字段，添加约束
mysql> alter table user4 modify id int primary key;
Query OK, 0 rows affected (0.08 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> describe user4;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | NO | PRI | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)5.5唯一约束
约束修饰的字段的值不可以重复。
mysql> create table user5(
-> id int,
-> name varchar(20));
Query OK, 0 rows affected (0.06 sec)
mysql> desc user5;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | YES | | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)
mysql> alter table user5 add unique(name);
Query OK, 0 rows affected (0.04 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> desc user5;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | YES | | NULL | |
| name | varchar(20) | YES | UNI | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)
mysql> insert into user5 values(1,'zhangsan');
Query OK, 1 row affected (0.03 sec)
mysql> insert into user5 values(1,'zhangsan');
ERROR 1062 (23000): Duplicate entry 'zhangsan' for key 'user5.name'
name=lisi不能重复
mysql> insert into user5 values(1,'lisi');
Query OK, 1 row affected (0.01 sec)
mysql> create table user6(
-> id int,
-> name varchar(20),
-> unique(name));
Query OK, 0 rows affected (0.07 sec)可以对id和name都添加唯一约束，这时候只要id+name不重复就可以添加记录。
mysql> create table user7(
-> id int,
-> name varchar(20),
-> unique(id,name));
Query OK, 0 rows affected (0.06 sec)
mysql> insert into user7 values(1,'zhangsan');
Query OK, 1 row affected (0.01 sec)
mysql> insert into user7 values(2,'zhangsan');
Query OK, 1 row affected (0.04 sec)
mysql> select * from user7;
+------+----------+
| id | name |
+------+----------+
| 1 | zhangsan |
| 2 | zhangsan |
+------+----------+
2 rows in set (0.00 sec)
如何删除唯一约束
mysql> alter table user6 drop index name;
Query OK, 0 rows affected (0.03 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> desc user6;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | YES | | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)通过modify添加唯一约束
mysql> alter table user6 modify name varchar(20) unique;
Query OK, 0 rows affected (0.03 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> desc user6;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | YES | | NULL | |
| name | varchar(20) | YES | UNI | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)总结：
- 建表的时候添加约束
- 可以用alter... add添加
- 可以用alter... modify添加约束
- 删除用alter...drop
5.6非空约束
修饰的字段不能为空null
mysql> create table user8(
-> id int,
-> name varchar(20) not null);
Query OK, 0 rows affected (0.05 sec)
mysql> desc user8;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | YES | | NULL | |
| name | varchar(20) | NO | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)测试：如果name为空
mysql> insert into user8 (id)values(1);
ERROR 1364 (HY000): Field 'name' doesn't have a default value正确添加不为空时
mysql> insert into user8 values(1,'lisi');
Query OK, 1 row affected (0.01 sec)
mysql> select *from user8;
+------+------+
| id | name |
+------+------+
| 1 | lisi |
+------+------+
1 row in set (0.00 sec)如果只传name是可以的
mysql> insert into user8 (name)values('zhangsan');
Query OK, 1 row affected (0.01 sec)
mysql> select *from user8;
+------+----------+
| id | name |
+------+----------+
| 1 | lisi |
| NULL | zhangsan |
+------+----------+
2 rows in set (0.00 sec)同样可以用alter ... add，alter ... modify来添加唯一约束。
5.7默认约束default
就是当我们插入字段值的时候，如果没有传值，就会使用默认值。
mysql> create table user9(
-> id int,
-> name varchar(20),
-> age int default 10
-> );
Query OK, 0 rows affected (0.06 sec)
查看表结构
mysql> desc user9;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | YES | | NULL | |
| name | varchar(20) | YES | | NULL | |
| age | int | YES | | 10 | |
+-------+-------------+------+-----+---------+-------+
3 rows in set (0.00 sec)插入值时直插入id和name那么age使用默认值10，如果age也插入值那么就使用插入的值不使用默认值。
mysql> insert into user9(id,name) values (1,'lisi');
Query OK, 1 row affected (0.01 sec)
mysql> select *from user9;
+------+------+------+
| id | name | age |
+------+------+------+
| 1 | lisi | 10 |
+------+------+------+
1 row in set (0.00 sec)5.8 外键约束
涉及到两个表：父表，子表。
班级表：
mysql> create table classes(
-> id int primary key,
-> name varchar(20)
-> );
Query OK, 0 rows affected (0.05 sec)
mysql> desc classes;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| id | int | NO | PRI | NULL | |
| name | varchar(20) | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.00 sec)插入值
mysql> insert into classes values(1,'yiban');
Query OK, 1 row affected (0.01 sec)
mysql> insert into classes values(2,'erban');
Query OK, 1 row affected (0.03 sec)
mysql> insert into classes values(3,'sanban');
Query OK, 1 row affected (0.01 sec)
mysql> select *from classes;
+----+--------+
| id | name |
+----+--------+
| 1 | yiban |
| 2 | erban |
| 3 | sanban |
+----+--------+
3 rows in set (0.00 sec)
学生表：
mysql> create table students(
-> id int primary key,
-> name varchar(20),
-> class_id int,
-> foreign key(class_id) references classes(id));
Query OK, 0 rows affected (0.06 sec)mysql> desc students;
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| id | int | NO | PRI | NULL | |
| name | varchar(20) | YES | | NULL | |
| class_id | int | YES | MUL | NULL | |
+----------+-------------+------+-----+---------+-------+
3 rows in set (0.00 sec)插入值
mysql> insert into students values(1001,'zhangsan',1);
Query OK, 1 row affected (0.01 sec)
mysql> insert into students values(1002,'zhangsan',2);
Query OK, 1 row affected (0.01 sec)
mysql> insert into students values(1003,'zhangsan',3);
Query OK, 1 row affected (0.04 sec)
mysql> select *from students;
+------+----------+----------+
| id | name | class_id |
+------+----------+----------+
| 1001 | zhangsan | 1 |
| 1002 | zhangsan | 2 |
| 1003 | zhangsan | 3 |
+------+----------+----------+
3 rows in set (0.00 sec)
父表classes中没有的数据值，是不可以在子表students中使用的。
父表中的记录被子表引用，是不可以被删除的。
mysql> delete from classes where id=3;
ERROR 1451 (23000): Cannot delete or update a parent row:
a foreign key constraint fails (`test2`.`students`,
CONSTRAINT `students_ibfk_1` FOREIGN KEY (`class_id`) REFERENCES `classes` (`id`))数据库三大范式
- 第一范式 1NF
数据库表中的所有字段都是不可分割的原子值。
mysql> create table student(
-> id int primary key,
-> name varchar(20),
-> address varchar(30)
-> );
Query OK, 0 rows affected (0.12 sec)
mysql> insert into student values(1,'zhangsan','甘肃会宁');
Query OK, 1 row affected (0.02 sec)
mysql> insert into student values(2,'lisi','甘肃会宁');
Query OK, 1 row affected (0.01 sec)
mysql> insert into student values(3,'laowang','甘肃会宁');
Query OK, 1 row affected (0.01 sec)
mysql> select * from student;
+----+----------+--------------+
| id | name | address |
+----+----------+--------------+
| 1 | zhangsan | 甘肃会宁 |
| 2 | lisi | 甘肃会宁 |
| 3 | laowang | 甘肃会宁 |
+----+----------+--------------+
3 rows in set (0.00 sec)address字段值还可以继续拆分的就不满足第一范式。
create table student2(
id int primary key,
name varchar(20),
country varchar(30),
privence varchar(30),
city varchar(30),
details varchar(30)
);insert into student2 values(1,'张三','中国','甘肃','兰州','安宁区安宁街道30号');
insert into student2 values(2,'李四','中国','甘肃','兰州','安宁区安宁街道34号');
insert into student2 values(3,'王五','中国','甘肃','兰州','安宁区安宁街道80号');
mysql> select * from student2;
+----+--------+---------+----------+--------+----------------------------+
| id | name | country | privence | city | details |
+----+--------+---------+----------+--------+----------------------------+
| 1 | 张三 | 中国 | 甘肃 | 兰州 | 安宁区安宁街道30号 |
| 2 | 李四 | 中国 | 甘肃 | 兰州 | 安宁区安宁街道34号 |
| 3 | 王五 | 中国 | 甘肃 | 兰州 | 安宁区安宁街道80号 |
+----+--------+---------+----------+--------+----------------------------+
3 rows in set (0.00 sec)范式：设计的越详细，对于某些实际操作可能更好，但不一定都有好处。一般要结合实际情况设计。
- 第二范式 2NF
第二范式必须是满足第一范式的前提下，要求，除主键外的每一列都必须完全依赖于主键。
如果出现不完全依赖，只可能发生在联合主键的情况下。
create table myolder(
product_id int,
customer_id int,
product_name varchar(30),
customer_name varchar(30),
primary key(product_id,customer_id)
);**问题：
除主键外的其他列，只依赖于主键的部分字段。
不满足第二范式
解决办法是拆表。**
create table myolder(
older_id int primary key,
product_id int,
customer_id int
);
create table product(
id int primary key,
name varchar(20)
);
create table customer(
id int primary key,
name varchar(20)
);分成三个表之后就满足第二范式的设计！！！
- 第三范式 3NF
必须先满足第二范式， 除开主键列的其他列之间不能有传递依赖关系。
例如：
create table myolder(
older_id int primary key,
product_id int,
customer_id int,
customer_phone varchar(15)
);在这个表中，我们可以看到customer_phone和customer_id之间存在依赖关系，这样就不满足第三范式的要求；解决办法是：我们把customer_phone放到customer表中。如下：
create table customer(
id int primary key,
name varchar(20),
phone varchar(15)
);查询练习题：
1.数据准备：
学生表student
学号：姓名：性别：出生日期：所在班级；
create table student (
sno varchar(20) primary key,
sname varchar(20) not null,
ssex varchar(10) not null,
sbirthday datetime,
class varchar(10)
);
教师表teacher
教师编号，教师名字，教师性别，出生日期，职称，所在部门。
create table teacher(
tno varchar(20) primary key,
tname varchar(20) not null,
tsex varchar(10) not null,
tbirthday datetime,
prof varchar(20),
depart varchar(20) not null
);课程表course
课程号，课程名称，教师编号
create table course(
cno varchar(20) primary key,
cname varchar(20) not null,
tno varchar(20) not null,
foreign key(tno) references teacher(tno)
);成绩表score
学号，课程号，成绩
create table score(
sno varchar(20) not null, cno varchar(20) not null,
degree decimal,
foreign key(sno) references student(sno),
foreign key(cno) references course(cno),
primary key(sno,cno)
);添加数据：
insert into student values('101', '曾华','男','1977-09-01','95033');
insert into student values('102','匡明','男','1975-10-02', '95031');
insert into student values('103','王丽','女','1976-01-23', '95033');
insert into student values('104', '李军','男','1976-02-20','95033');
insert into student values('105','王芳','女','1975-02-10', '95031');
insert into student values('106','陆君','男','1974-06-03','95031');
insert into student values('107','王尼玛','男','1974-06-03','95031');
insert into student values('108','张全蛋','男','1974-06-03','95031');
insert into student values('109','赵铁柱','男','1974-06-03','95031');
insert into teacher values('804','李诚','男','1958-12-02', '副教授','计算机系');
insert into teacher values('856','张旭','男','1969-03-12','讲师','电子工程系');
insert into teacher values('825','王萍','女','1972-05-05','助教','计算机系');
insert into teacher values('831','刘冰','女','1977-08-14','助教','电子工程系');
insert into course values('3-105','计算机导论', '825');
insert into course values('3-245','操作系统','804');
insert into course values('6-166','数字电路','856');
insert into course values('9-888','高等数学','831');
insert into score values('103','3-105','92');
insert into score values('103','3-245','86');
insert into score values('103','6-166','85');
insert into score values('105','3-105','88');
insert into score values('105','3-245','75');
insert into score values('105','6-166','79');
insert into score values('109','3-105','76');
insert into score values('109','3-245','68');
insert into score values('109','6-166','81');