MySQL的一些基本操作 - 数据库编程

最近开始学习MySQL，主要是通过书籍，和看燕十八老师的视频，然后通过博客记录自己的学习过程。

zhiniaobu@telunsu-K55VD:~$ mysql -uroot -p
Enter password:

查看当前所有数据库

mysql> show databases;#查看当前所有数据库
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)

创建数据库ceshi

mysql> create database ceshi;#创建数据库ceshi
Query OK, 1 row affected (0.00 sec)

mysql> show databases;#查看当前所有数据库，会看到现在多了一个ceshi
+--------------------+
| Database           |
+--------------------+
| information_schema |
| ceshi              |
| mysql              |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)

查看数据库ceshi的定义

mysql> show create database ceshi;#查看数据库ceshi的定义
+----------+------------------------------------------------------------------+
| Database | Create Database                                                  |
+----------+------------------------------------------------------------------+
| ceshi    | CREATE DATABASE `ceshi` /*!40100 DEFAULT CHARACTER SET latin1 */ |
+----------+------------------------------------------------------------------+
1 row in set (0.00 sec)

删除数据库ceshi

mysql> drop database ceshi;#删除数据库ceshi
Query OK, 0 rows affected (0.07 sec)

mysql> show databases;#查看当前所有数据库，现在会发现ceshi已经不存在了，因为已经删除了
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec

使用数据库

mysql> create database ceshi_ku;#先建立一个库，等下用来建表
Query OK, 1 row affected (0.00 sec)

mysql> show databases;#ceshi_ku已经成功的建立了
+--------------------+
| Database           |
+--------------------+
| information_schema |
| ceshi_ku           |
| mysql              |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)

mysql> use ceshi_ku;#建立表之前，首先要选择一个库
Database changed

查看当前库下面的所有表

mysql> show tables;#查看当前库下面的所有表，目前是什么表也没有
Empty set (0.00 sec)

创建表

mysql> create table ceshi_biao
    -> (
    -> id int(11),
    -> salary float
    -> );#建立ceshi_biao表
Query OK, 0 rows affected (0.10 sec)

mysql> show tables;#查看当前库下面的所有表，ceshi_biao表已经成功建立
+--------------------+
| Tables_in_ceshi_ku |
+--------------------+
| ceshi_biao         |
+--------------------+
1 row in set (0.00 sec)

查看表基本结构

mysql> desc ceshi_biao;#查看ceshi_biao表基本结构
+--------+---------+------+-----+---------+-------+
| Field  | Type    | Null | Key | Default | Extra |
+--------+---------+------+-----+---------+-------+
| id     | int(11) | YES  |     | NULL    |       |
| salary | float   | YES  |     | NULL    |       |
+--------+---------+------+-----+---------+-------+
2 rows in set (0.04 sec)

查看表详细结构

mysql> show create table ceshi_biao;#查看ceshi_biao表详细结构
+------------+-------------------------------------------------------------------------------------------------------------------------------+
| Table      | Create Table                                                                                                                  |
+------------+-------------------------------------------------------------------------------------------------------------------------------+
| ceshi_biao | CREATE TABLE `ceshi_biao` (
  `id` int(11) DEFAULT NULL,
  `salary` float DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 |

MySQL的一些基本操作(一)