DROP Statements 

Deletes existing entity. If the IF EXISTS clause is specified, these queries do not return an error if the entity does not exist.

DROP DATABASE 

Deletes all tables inside the db database, then deletes the db database itself.

Syntax:

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

DROP TABLE 

Deletes the table.

Syntax:

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

DROP DICTIONARY 

Deletes the dictionary.

Syntax:

DROP DICTIONARY [IF EXISTS] [db.]name

DROP USER 

Deletes a user.

Syntax:

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

DROP ROLE 

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

Syntax:

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

DROP ROW POLICY 

Deletes a row policy. Deleted row policy is revoked from all the entities where it was assigned.

Syntax:

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.

Syntax:

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

DROP SETTINGS PROFILE 

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

Syntax:

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

DROP VIEW 

Deletes a view. Views can be deleted by a DROP TABLE command as well but DROP VIEW checks that [db.]name is a view.

Syntax:

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

DROP FUNCTION 

Deletes a user defined function created by CREATE FUNCTION.
System functions can not be dropped.

Syntax

DROP FUNCTION [IF EXISTS] function_name

Example

CREATE FUNCTION linear_equation AS (x, k, b) -> k*x + b;
DROP FUNCTION linear_equation;

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