DROP SCHEMA (Transact-SQL)
Removes a schema from the database.
-- Syntax for SQL Server and Azure SQL Database DROP SCHEMA [ IF EXISTS ] schema_name
-- Syntax for Azure SQL Data Warehouse and Parallel Data Warehouse DROP SCHEMA schema_name
Applies to: SQL Server ( SQL Server 2016 through current version).
Conditionally drops the schema only if it already exists.
Is the name by which the schema is known within the database.
The schema that is being dropped must not contain any objects. If the schema contains objects, the DROP statement fails.
Information about schemas is visible in the sys.schemas catalog view.
Caution Beginning with SQL Server 2005, the behavior of schemas changed. As a result, code that assumes that schemas are equivalent to database users may no longer return correct results. Old catalog views, including sysobjects, should not be used in a database in which any of the following DDL statements have ever been used: CREATE SCHEMA, ALTER SCHEMA, DROP SCHEMA, CREATE USER, ALTER USER, DROP USER, CREATE ROLE, ALTER ROLE, DROP ROLE, CREATE APPROLE, ALTER APPROLE, DROP APPROLE, ALTER AUTHORIZATION. In such databases you must instead use the new catalog views. The new catalog views take into account the separation of principals and schemas that was introduced in SQL Server 2005. For more information about catalog views, see Catalog Views (Transact-SQL).
Requires CONTROL permission on the schema or ALTER ANY SCHEMA permission on the database.
The following example starts with a single
CREATE SCHEMA statement. The statement creates the schema
Sprockets that is owned by
Krishna and a table
Sprockets.NineProngs, and then grants
SELECT permission to
Anibal and denies
SELECT permission to
CREATE SCHEMA Sprockets AUTHORIZATION Krishna CREATE TABLE NineProngs (source int, cost int, partnumber int) GRANT SELECT TO Anibal DENY SELECT TO Hung-Fu; GO
The following statements drop the schema. Note that you must first drop the table that is contained by the schema.
DROP TABLE Sprockets.NineProngs; DROP SCHEMA Sprockets; GO