Check out example codes for "sql drop table if exists". It will help you in understanding the concepts better.

Code Example 1

DROP TABLE IF EXISTS dbo.Customers

Code Example 2

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

Code Example 3

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

Code Example 4

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

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