115 lines
2.7 KiB
Markdown
115 lines
2.7 KiB
Markdown
CREATE USER
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================================
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描述
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-----------
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该语句用于创建新的 OceanBase 用户。创建新用户后，可以使用该用户连接 OceanBase。
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**说明**
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必须拥有全局的CREATE USER权限，才可以使用CREATE USER命令。
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格式
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-----------
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```javascript
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create_user_stmt:
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CREATE USER [IF NOT EXISTS] user_name [IDENTIFIED BY 'password'];
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alter_user_stmt:
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ALTER USER user_name ACCOUNT {LOCK | UNLOCK};
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| ALTER USER user_name IDENTIFIED BY 'password';
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| SET PASSWORD [FOR user_name] = PASSWORD('password');
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| RENAME USER rename_user_action_list;
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drop_user_stmt:
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DROP USER user_name_list;
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rename_user_action_list:
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rename_user_action [, rename_user_action ...]
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rename_user_action:
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user_name TO user_name
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user_name_list:
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user_name [, user_name ...]
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password:
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STR_VALUE
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CREATE USER [IF NOT EXISTS] user_specification_list;
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user_specification_list:
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user_specification [, user_specification ...]
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user_specification:
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user IDENTIFIED BY 'authstring'
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| user IDENTIFIED BY PASSWORD 'hashstring'
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```
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参数解释
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-------------
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| **参数** | **描述** |
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|------------------------------------------|----------------------------------------------------|
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| user_name | 用户名，新建用户后，"mysql.user"表会新增一行该用户的表项。如果同名用户已经存在，则报错。 |
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| IDENTIFIED BY | 使用自选的 IDENTIFIED BY 子句，可以为账户给定一个密码。 |
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| user_name \[, user_name ...\] | 同时创建多个用户时，用","隔开。 |
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| user IDENTIFIED BY 'authstring' | 此处密码为明文，存入"mysql.user"表后，服务器端会变为密文存储下来。 |
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| user IDENTIFIED BY PASSWORD 'hashstring' | 此处密码为密文。 |
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示例
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-----------
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1. 执行以下命令创建名为 sqluser01 和 sqluser02 的用户，密码均为 123456。
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```javascript
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CREATE USER 'sqluser01' IDENTIFIED BY '123456', 'sqluser02' IDENTIFIED BY '123456';
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```
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2. 执行以下命令查看创建的用户。
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```javascript
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SELECT user FROM mysql.user;
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```
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执行结果如下所示。
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```javascript
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mysql> CREATE USER 'sqluser01' IDENTIFIED BY '123456', 'sqluser02' IDENTIFIED BY '123456';
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Query OK, 0 rows affected (0.12 sec)
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mysql> select user from mysql.user;
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+-----------+
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| user |
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+-----------+
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| root |
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| admin |
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| sqluser01 |
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| sqluser02 |
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+-----------+
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4 rows in set (0.00 sec)
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```
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