1,啟動MySQL

終端輸入

mysql -u root -p

然後輸入密碼，啟動成功

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mysql> 

2,基本操作

2.1檢視MySQL下的所有資料庫

SHOW DATABASES;

2.2選擇要操作的資料庫：use 資料庫名；

比如我們要使用資料庫work

use work;

mysql> use work;
Reading table information for completion of table and column names
You can turn off this feature to
 
 get a quicker startup with -A

Database changed

此後我們的所有操作都針對work

2.3建立資料庫：使用create命令

CREATE DATABASE 資料庫名;

例如我們要建立一個名為work的資料庫

CREATE DATABASE work;

如果work資料庫不存在則建立，如果存在則不會建立

work已存在，顯示如下資訊

mysql> CREATE DATABASE work;
ERROR 1007 (HY000): Can't create database 'work'; database exists

2.4檢視某個資料庫 使用LIKE從句，他用於匹配指定的資料庫名稱

SHOW DATABASES LIKE '資料庫名';

例如我們要檢視資料庫work

SHOW DATABASES LIKE 'work';

mysql> SHOW DATABASES LIKE 'work';
+-----------------+
| Database (work) |
+-----------------+
| work            |
+-----------------+
1 row in set (0.00 sec)

2.4檢視某資料庫的資訊（定義宣告）

SHOW CREATE DATABASE 資料庫名;

檢視work的資訊（定義宣告）

SHOW CREATE DATABASE work;

mysql> SHOW CREATE DATABASE work;
+----------+--------------------------------------------------------------------------------------------------------------------------------+
| Database | Create Database                                                                                                                |
+----------+--------------------------------------------------------------------------------------------------------------------------------+
| work     | CREATE DATABASE `work` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT ENCRYPTION='N' */ |
+----------+--------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

2.5修改資料庫

ALTER DATABASE 資料庫名

終端下：

mysql> ALTER DATABASE 資料庫名
    -> DEFAULT CHARACTER SET 字符集名
    -> DEFAULT COLLATE 校對規則名;

對work資料庫進行修改

檢視：

 SHOW CREATE DATABASE work;
+----------+--------------------------------------------------------------------------------------------------------------------------------+
| Database | Create Database                                                                                                                |
+----------+--------------------------------------------------------------------------------------------------------------------------------+
| work     | CREATE DATABASE `work` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT ENCRYPTION='N' */ |
+----------+--------------------------------------------------------------------------------------------------------------------------------+

修改：

mysql> ALTER DATABASE work
    -> DEFAULT CHARACTER SET gb2312
    -> DEFAULT COLLATE gb2312_chinese_ci;
Query OK, 1 row affected (0.02 sec)

再次檢視：修改成功

mysql> SHOW CREATE DATABASE work;
+----------+----------------------------------------------------------------------------------------------------+
| Database | Create Database                                                                                    |
+----------+----------------------------------------------------------------------------------------------------+
| work     | CREATE DATABASE `work` /*!40100 DEFAULT CHARACTER SET gb2312 */ /*!80016 DEFAULT ENCRYPTION='N' */ |
+----------+----------------------------------------------------------------------------------------------------+

2.6刪除資料庫，使用DORP命令(謹慎使用)不能刪除MySQL安裝時自己建立的資料庫

命令格式：

DROP DATABASE 資料庫名;

例：刪除work_tb1

DROP DATABASE work_tb1;

mysql> DROP DATABASE work_tb1;
Query OK, 0 rows affected (0.02 sec)