MySQL的数据库操作

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MySQL的数据库操作

查看数据库

使用

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.03 sec)

使用

mysql> show create database mysql;
+----------+---------------------------------------------------------------------------------------------------------------------------------+
| Database | Create Database                                                                                                                 |
+----------+---------------------------------------------------------------------------------------------------------------------------------+
| mysql    | CREATE DATABASE `mysql` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT ENCRYPTION='N' */ |
+----------+---------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.01 sec)

使用

mysql> select database();
+------------+
| database() |
+------------+
| mysql      |
+------------+
1 row in set (0.00 sec)

使用

mysql> show variables like 'character%';
+--------------------------+--------------------------------+
| Variable_name            | Value                          |
+--------------------------+--------------------------------+
| character_set_client     | latin1                         |
| character_set_connection | latin1                         |
| character_set_database   | utf8mb4                        |
| character_set_filesystem | binary                         |
| character_set_results    | latin1                         |
| character_set_server     | utf8mb4                        |
| character_set_system     | utf8                           |
| character_sets_dir       | /usr/share/mysql-8.0/charsets/ |
+--------------------------+--------------------------------+
8 rows in set (0.00 sec)

创建数据库

使用

mysql> create database students charset utf8;
Query OK, 1 row affected, 1 warning (0.05 sec)

切换数据库

使用

mysql> use students;
Database changed
mysql> select database();
+------------+
| database() |
+------------+
| students   |
+------------+
1 row in set (0.00 sec)

修改数据库

使用

mysql> show create database students;
+----------+------------------------------------------------------------------------------------------------------+
| Database | Create Database                                                                                      |
+----------+------------------------------------------------------------------------------------------------------+
| students | CREATE DATABASE `students` /*!40100 DEFAULT CHARACTER SET utf8 */ /*!80016 DEFAULT ENCRYPTION='N' */ |
+----------+------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> alter database students charset=gbk;
Query OK, 1 row affected (0.01 sec)

mysql> show create database students;
+----------+-----------------------------------------------------------------------------------------------------+
| Database | Create Database                                                                                     |
+----------+-----------------------------------------------------------------------------------------------------+
| students | CREATE DATABASE `students` /*!40100 DEFAULT CHARACTER SET gbk */ /*!80016 DEFAULT ENCRYPTION='N' */ |
+----------+-----------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

删除数据库

使用

mysql> drop database if exists students;
Query OK, 0 rows affected (0.09 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

系统库

MySQL

information_schema

performance_schema

MySQL5.5

mysql

sys

今天关于《MySQL的数据库操作》的内容就介绍到这里了，是不是学起来一目了然！想要了解更多关于mysql的内容请关注golang学习网公众号！