Skip to main content

DROP语法

删除现有实体。 如果指定了IF EXISTS子句,如果实体不存在,这些查询不会返回错误。

DROP DATABASE

删除db数据库中的所有表,然后删除db数据库本身。

语法:

DROP DATABASE [IF EXISTS] db [ON CLUSTER cluster]

DROP TABLE

删除数据表

语法:

DROP [TEMPORARY] TABLE [IF EXISTS] [db.]name [ON CLUSTER cluster]

DROP DICTIONARY

删除字典。

语法:

DROP DICTIONARY [IF EXISTS] [db.]name

DROP USER

删除用户.

语法:

DROP USER [IF EXISTS] name [,...] [ON CLUSTER cluster_name]

DROP ROLE

删除角色。删除的角色将从分配给它的所有实体中撤消。

语法:

DROP ROLE [IF EXISTS] name [,...] [ON CLUSTER cluster_name]

DROP ROW POLICY

删除行策略。 删除的行策略从分配到它的所有实体中撤消。

语法:

DROP [ROW] POLICY [IF EXISTS] name [,...] ON [database.]table [,...] [ON CLUSTER cluster_name]

DROP QUOTA

Deletes a quota. The deleted quota is revoked from all the entities where it was assigned.

语法:

DROP QUOTA [IF EXISTS] name [,...] [ON CLUSTER cluster_name]

DROP SETTINGS PROFILE

删除配置文件。 已删除的设置配置文件将从分配给它的所有实体中撤销。

语法:

DROP [SETTINGS] PROFILE [IF EXISTS] name [,...] [ON CLUSTER cluster_name]

DROP VIEW

删除视图。 视图也可以通过DROP TABLE命令删除,但DROP VIEW会检查[db.]name是否是一个视图。

语法:

DROP VIEW [IF EXISTS] [db.]name [ON CLUSTER cluster]

原始文章