September 2009
Intermediate to advanced
832 pages
23h 31m
English
book
Inside Microsoft® SQL Server® 2008: T-SQL Programming
by Dejan Sarka Itzik Ben-Gan Greg Low, Roger Wolter, Ed Katibah, and Isaac Kunen
Content preview from Inside Microsoft® SQL Server® 2008: T-SQL ProgrammingBecome 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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Chapter 8. Cursors
Itzik Ben-Gan
A cursor is a programmatic construct in T-SQL. It represents a result set of a query that you can iterate through one row at a time, possibly in a predetermined order. Programmers who are used to procedural programming but are not yet experienced with SQL tend to use cursors a lot because using cursors feels like an extension of what they already know. However, you should be aware of the implications of using cursors. Using cursors is not in accord with the relational model, which deals with whole sets, as opposed to dealing with individual rows. By using cursors, you pretty much go against the model. Also, in terms of the work done by the Microsoft SQL Server engine, the processing of each cursor row incurs an ...
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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.
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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.