How to insert into a table with just one IDENTITY column?

Question

(Came up with this question in the course of trying to answer this other one)

Consider the following MS-SQL table, called GroupTable:

GroupID
-------
1          


        

Answer 1

It is possible to insert more than one row at a time.

For e.g., to insert 30 rows. INSERT INTO GroupTable DEFAULT VALUES GO 30

This will insert 30 rows by incrementing the identity column each time.