Update: DML command used to interact with the date itself. select: command used to display already existing data. Delete: DML command used to erase data from the database objects such as tables.

Using default values on database columns helps to insulate database design issues from application code. Find out how to change a column's default value at a later date using a single command.

Update: DML command used to interact with the date itself. select: command used to display already existing data. Delete: DML command used to erase data from the database objects such as tables.