December 2002
Intermediate to advanced
928 pages
85h 29m
English
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Group Conditions
A group condition compares an expression to a group of results. The syntax for a group comparison is:
[(]expr[,expr. . .][)]simple_conditionANY | SOME | ALL | IN| NOT IN (subquery|expression_list[,subquery|expression_list. . .])
If you use multiple expressions on the left of the condition, you must have an equal number of values, with matching datatypes, on the right of the condition.
If any values on the right of the NOT IN condition evaluate to NULL, then the condition always evaluates to FALSE. If the values on the right of the NOT IN condition constitute a subquery that returns no rows, all rows in the parent query containing the condition are returned.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.