Many a times you need to delete the record but at the same time you need to make sure all the related or referenced records are also deleted.
This is because you can not delete a record if it is referenced in another table.
In this case you can either delete the referenced record or you can set the “Cascade Delete On”.
CREATE TABLE [dbo].[Tracks](
[TrackID] [int] NOT NULL PRIMARY KEY,
[Title] [varchar](50) NULL,
[AlbumID] [int] NULL,
[Duration] [time](0) NULL)