You can insert data into a table based on other data in the same table. Essentially, this means copying all or part of a row.
For example, you can insert a new row in the publishers table that is based on the values in an existing row in the same table. Make sure you follow the rule on the pub_id column:
insert publishers select "9999", "test", city, state from publishers where pub_name = "New Age Books"
(1 row affected)
select * from publishers
pub_id pub_name city state ------- --------------------- ------- ------ 0736 New Age Books Boston MA 0877 Binnet & Hardley Washington DC 1389 Algodata Infosystems Berkeley CA 9999 test Boston MA (4 rows affected)
The example inserts the two constants (“9999” and “test”) and the values from the city and state columns in the row that satisfied the query.
