描述数据库Describe Database

DESCRIBE DATABASE [EXTENDED] db_name

返回现有数据库的元数据(名称、注释和位置)。Return the metadata of an existing database (name, comment and location). 如果该数据库不存在,则会引发异常。If the database does not exist, an exception is thrown.

EXTENDED

显示数据库属性。Display the database properties.