You can use computed columns in a select statement inside an insert statement. For example, imagine that a table named tmp contains some new rows for the titles table, which contains some out-of-date data—the price figures need to be doubled. A statement to increase the prices and insert the tmp rows into titles looks like:
insert titles
select title_id, title, type, pub_id, price*2,
advance, total_sales, notes, pubdate, contract
from tmp
When you perform computations on a column, you cannot use the select * syntax. Each column must be named individually in the select list.
