April 2006
Intermediate to advanced
640 pages
16h 46m
English
Content preview from Inside Microsoft® SQL Server™ 2005: T-SQL QueryingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Solutions to Common Problems Using TOP and APPLY
Now that the fundamentals of TOP and APPLY have been covered, I’ll present common problems and solutions that use TOP and APPLY.
TOP n for Each Group
In Chapter 4 and Chapter 6, I discussed a problem involving tiebreakers where you were asked to return the most recent order for each employee. This problem is actually a special case of a more generic problem where you are after the top n rows for each group—for example, returning the three most recent orders for each employee. Again, orders with higher OrderDate values have precedence, but you need to introduce a tiebreaker to determine precedence in case of ties. Here I’ll use the maximum OrderID as the tiebreaker. I’ll present solutions to this class ...
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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.