SQL Server IF NOT EXISTS (Create Database) ตรวจสอบ Database ก่อนการสร้าง

IF NOT EXISTS (SELECT * FROM sys.databases WHERE name='Sales')

	CREATE DATABASE Sales
	ON 
	( NAME = Sales_dat,
	   FILENAME = 'D:\Database\saledat.mdf',
	   SIZE = 10,
	   MAXSIZE = 50,
	   FILEGROWTH = 5 )
	LOG ON
	( NAME = 'Sales_log',
	   FILENAME = 'D:\Database\salelog.ldf',
	   SIZE = 5MB,
	   MAXSIZE = 25MB,
	   FILEGROWTH = 5MB )

GO