Sql-Server

NOT IN vs NOT EXISTS

NOT IN vs NOT EXISTS

Which of these queries is the quicker NOT EXISTS Choice ProductID ProductName FROM NorthwindMerchandise p Wherever NOT EXISTS Choice 1 FROM NorthwindCommand
Adding an identity to an existing column

Adding an identity to an existing column

I demand to alteration the capital cardinal of a array to an individuality file and locations already a figure of rows successful array Ive acquired a book to