Problem: I have a table that has a field I want to plug with a value
from other tables.
I can do it with a perl program and a loop, but want to do it with a
single SQL statement.
Is there a way to do an update that combines a select statement
containing a "where" that uses a field from the row to be updated?
I would expect it to look something like this:
update orderheader set total = (select sum(amount) from orderdetail
where orderdetail.orderno=orderheader.orderno) ;
Any ideas?
