启动mysql
运行到安装目录C:\Program Files\MySQL\MySQL Server 5.6\bin>输入mysqld.exe –install得到结果Service successfully installed输入net start mysql //启动mysqlnet stop mysql //关闭mysql
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Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 8Server version: 5.6.10 MySQL Community Server (GPL)Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>
数据库操作
查看数据库的版本号和服务器当前时间
mysql> select version(),current_date;
输出:
+-----------+--------------+| version() | current_date |+-----------+--------------+| 5.6.10 | 2013-08-05 |+-----------+--------------+1 row in set (0.01 sec)
查看服务器的所有数据库
mysql> show databases;
+--------------------+| Database |+--------------------+| information_schema || mysql || performance_schema |+--------------------+3 rows in set (0.00 sec)
创建数据库
mysql> create database leaf;Query OK, 1 row affected (0.01 sec)
mysql> use leaf;Database changed
mysql> select database();+------------+| database() |+------------+| leaf |+------------+1 row in set (0.00 sec)
创建表
mysql> create table leaf(leaf_id varchar(6) -> ,leaf_name varchar(10) -> ,leaf_age int -> ,leaf_sal int -> ,leaf_bir date -> ,leaf_sex varchar(5) -> );Query OK, 0 rows affected (0.13 sec)
显示当前数据库的表
mysql> show tables;+----------------+| Tables_in_leaf |+----------------+| leaf |+----------------+1 row in set (0.00 sec)
查看数据表的结构
mysql> describe leaf;+-----------+-------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+-----------+-------------+------+-----+---------+-------+| leaf_id | varchar(6) | YES | | NULL | || leaf_name | varchar(10) | YES | | NULL | || leaf_age | int(11) | YES | | NULL | || leaf_sal | int(11) | YES | | NULL | || leaf_bir | date | YES | | NULL | || leaf_sex | varchar(5) | YES | | NULL | |+-----------+-------------+------+-----+---------+-------+6 rows in set (0.01 sec)
往表中插入数据
mysql> insert into leaf values -> ('101','leaf','10','6000','2013-8-5','male'), -> ('102','lea','20','5000','2013-8-4','male'), -> ('103','le','30','4000','2013-8-3','female'), -> ('104','l','35','4000','2013-8-2','female');Query OK, 4 rows affected, 2 warnings (0.01 sec)Records: 4 Duplicates: 0 Warnings: 2 查看表中数据
mysql> select * from leaf;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 101 | leaf | 10 | 6000 | 2013-08-05 | male || 102 | lea | 20 | 5000 | 2013-08-04 | male || 103 | le | 30 | 4000 | 2013-08-03 | femal || 104 | l | 35 | 4000 | 2013-08-02 | femal |+---------+-----------+----------+----------+------------+----------+4 rows in set (0.00 sec)
修改数据
mysql> update leaf set leaf_id=100 where leaf_name='leaf';Query OK, 1 row affected (0.00 sec)Rows matched: 1 Changed: 1 Warnings: 0mysql> select * from leaf;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 6000 | 2013-08-05 | male || 102 | lea | 20 | 5000 | 2013-08-04 | male || 103 | le | 30 | 4000 | 2013-08-03 | femal || 104 | l | 35 | 4000 | 2013-08-02 | femal |+---------+-----------+----------+----------+------------+----------+4 rows in set (0.00 sec)
对表中数据薪水项全部加2000
mysql> update leaf set leaf_sal=leaf_sal+2000;Query OK, 4 rows affected (0.00 sec)Rows matched: 4 Changed: 4 Warnings: 0mysql> select * from leaf;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 8000 | 2013-08-05 | male || 102 | lea | 20 | 7000 | 2013-08-04 | male || 103 | le | 30 | 6000 | 2013-08-03 | femal || 104 | l | 35 | 6000 | 2013-08-02 | femal |+---------+-----------+----------+----------+------------+----------+4 rows in set (0.00 sec)
查询
mysql> select * from leaf where leaf_name='leaf';+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 8000 | 2013-08-05 | male |+---------+-----------+----------+----------+------------+----------+1 row in set (0.00 sec)
查询表中，leaf_sal>6000的信息
mysql> select * from leaf where leaf_sal>6000;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 8000 | 2013-08-05 | male || 102 | lea | 20 | 7000 | 2013-08-04 | male |+---------+-----------+----------+----------+------------+----------+2 rows in set (0.00 sec)
查询所有人工资情况
mysql> select leaf_name,leaf_sal from leaf;+-----------+----------+| leaf_name | leaf_sal |+-----------+----------+| leaf | 8000 || lea | 7000 || le | 6000 || l | 6000 |+-----------+----------+4 rows in set (0.00 sec)
查询结果排序，按照工资低到高排序
mysql> select * from leaf order by leaf_sal;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 103 | le | 30 | 6000 | 2013-08-03 | femal || 104 | l | 35 | 6000 | 2013-08-02 | femal || 102 | lea | 20 | 7000 | 2013-08-04 | male || 100 | leaf | 10 | 8000 | 2013-08-05 | male |+---------+-----------+----------+----------+------------+----------+4 rows in set (0.00 sec)
按照工资由高到低排序
mysql> select * from leaf order by leaf_sal desc;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 8000 | 2013-08-05 | male || 102 | lea | 20 | 7000 | 2013-08-04 | male || 103 | le | 30 | 6000 | 2013-08-03 | femal || 104 | l | 35 | 6000 | 2013-08-02 | femal |+---------+-----------+----------+----------+------------+----------+4 rows in set (0.00 sec)
查看工资前两名
mysql> select * from leaf order by leaf_sal desc limit 2;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 8000 | 2013-08-05 | male || 102 | lea | 20 | 7000 | 2013-08-04 | male |+---------+-----------+----------+----------+------------+----------+2 rows in set (0.00 sec)
随机查看两人
mysql> select * from leaf order by rand() limit 2;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 104 | l | 35 | 6000 | 2013-08-02 | femal || 103 | le | 30 | 6000 | 2013-08-03 | femal |+---------+-----------+----------+----------+------------+----------+2 rows in set (0.00 sec)
查询8月份出生的人
mysql> select * from leaf where month(leaf_bir)=8;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 8000 | 2013-08-05 | male || 102 | lea | 20 | 7000 | 2013-08-04 | male || 103 | le | 30 | 6000 | 2013-08-03 | femal || 104 | l | 35 | 6000 | 2013-08-02 | femal |+---------+-----------+----------+----------+------------+----------+4 rows in set (0.00 sec)
数据统计
mysql> select count(*) from leaf;+----------+| count(*) |+----------+| 4 |+----------+1 row in set (0.00 sec)
使用统计函数
mysql> select -> min(leaf_sal) as min_salary, -> max(leaf_sal) as max_salary, -> sum(leaf_sal) as sum_salary, -> avg(leaf_sal) as avg_salary, -> count(*) as employee_num -> from leaf;+------------+------------+------------+------------+--------------+| min_salary | max_salary | sum_salary | avg_salary | employee_num |+------------+------------+------------+------------+--------------+| 6000 | 8000 | 27000 | 6750.0000 | 4 |+------------+------------+------------+------------+--------------+1 row in set (0.00 sec)
表单数据删除
mysql> delete from leaf where leaf_name='l';Query OK, 1 row affected (0.06 sec)mysql> select * from leaf;+---------+-----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_bir | leaf_sex |+---------+-----------+----------+----------+------------+----------+| 100 | leaf | 10 | 8000 | 2013-08-05 | male || 102 | lea | 20 | 7000 | 2013-08-04 | male || 103 | le | 30 | 6000 | 2013-08-03 | femal |+---------+-----------+----------+----------+------------+----------+3 rows in set (0.00 sec)
数据表重命名
alter table 原始表名 rename as 新表名
mysql> alter table leaf rename as lea;Query OK, 0 rows affected (0.09 sec)
删除数据表
mysql> drop database leaf;
官方示例数据库
C:\Users\Administrator\Downloads\employees_db-full-1.0.6\employees_db>mysql -t -u root -p < employees.sql
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