DROP SYNONYM (Transact-SQL)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Removes a synonym from a specified schema.
Transact-SQL syntax conventions
Syntax
DROP SYNONYM [ IF EXISTS ] [ schema. ] synonym_name
Arguments
IF EXISTS
Applies to: SQL Server ( SQL Server 2016 (13.x) through current version).
Conditionally drops the synonym only if it already exists.
schema
Specifies the schema in which the synonym exists. If schema is not specified, SQL Server uses the default schema of the current user.
synonym_name
Is the name of the synonym to be dropped.
Remarks
References to synonyms are not schema-bound; therefore, you can drop a synonym at any time. References to dropped synonyms will be found only at run time.
Synonyms can be created, dropped and referenced in dynamic SQL.
Permissions
To drop a synonym, a user must satisfy at least one of the following conditions. The user must be:
The current owner of a synonym.
A grantee holding CONTROL on a synonym.
A grantee holding ALTER SCHEMA permission on the containing schema.
Examples
The following example first creates a synonym, MyProduct, and then drops the synonym.
USE tempdb;
GO
-- Create a synonym for the Product table in AdventureWorks2022.
CREATE SYNONYM MyProduct
FOR AdventureWorks2022.Production.Product;
GO
-- Drop synonym MyProduct.
USE tempdb;
GO
DROP SYNONYM MyProduct;
GO