DROP DATABASE 
==================================



描述 
-----------

DROP DATABASE 用于删除数据库。

格式 
-----------

```javascript
drop_database_stmt:
DROP DATABASE [IF EXISTS] database_name;
```



参数解释 
-------------



|    **参数**     |      **描述**       |
|---------------|-------------------|
| IF EXISTS     | 用于防止当数据库不存在时发生错误。 |
| database_name | 指定待删除的数据库名。       |



示例 
-----------

* 删除数据库 test2。




```javascript
OceanBase(admin@test)>drop database test2;
Query OK, 0 rows affected (0.03 sec)
```



* 删除不存在的数据库 notest。




```javascript
OceanBase(admin@test)>drop database notest;
ERROR 1008 (HY000): Can't drop database 'notest'; database doesn't exist

OceanBase(admin@test)>drop database if exists notest;
Query OK, 0 rows affected, 1 warning (0.00 sec)

OceanBase(admin@test)>show warnings;
+-------+------+------------------------------------------------------+
| Level | Code | Message                                              |
+-------+------+------------------------------------------------------+
| Note  | 1008 | Can't drop database 'notest'; database doesn't exist |
+-------+------+------------------------------------------------------+
1 row in set (0.00 sec)
```



