SQL

sql drop table if exists

DROP TABLE IF EXISTS dbo.Customers

sql server drop table if exists

IF OBJECT_ID('dbo.Scores', 'U') IS NOT NULL DROP TABLE dbo.Scores; 

SQL DROP TABLE IF EXISTS

DROP TABLE IF EXISTS my_table;

t-sql drop function if exists

IF EXISTS (
    SELECT * FROM sysobjects WHERE id = object_id(N'function_name') 
    AND xtype IN (N'FN', N'IF', N'TF')
)
    DROP FUNCTION function_name
GO

sql server drop table if exists

-- Classic table
IF OBJECT_ID('my_schema.my_table', 'U') IS NOT NULL DROP TABLE my_schema.my_table; 
-- Temporary table
IF OBJECT_ID('tempdb.my_schema.#my_table') IS NOT NULL DROP TABLE #my_table; 

sql drop table if exists

IF OBJECT_ID('dbo.Scores', 'U') IS NOT NULL 
  DROP TABLE dbo.Scores;