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Applies to: 
 SQL Server 2016 (13.x) and later versions 
 Azure SQL Database 
 Azure SQL Managed Instance 
 SQL analytics endpoint in Microsoft Fabric 
 Warehouse in Microsoft Fabric
Deletes a security policy.
 Transact-SQL syntax conventions
Syntax
DROP SECURITY POLICY [ IF EXISTS ] [schema_name. ] security_policy_name    
[;]  
Arguments
IF EXISTS
Applies to: SQL Server ( SQL Server 2016 (13.x) through current version).
Conditionally drops the security policy only if it already exists.
schema_name
Is the name of the schema to which the security policy belongs.
security_policy_name
The name of the security policy. Security policy names must comply with the rules for identifiers and must be unique within the database and to its schema.
Remarks
Permissions
Requires the ALTER ANY SECURITY POLICY permission and ALTER permission on the schema.
Examples
DROP SECURITY POLICY secPolicy;