October 2008
Beginner to intermediate
1024 pages
31h 30m
English
Content preview from Programming Microsoft® SQL Server™ 2008Become 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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TOP Enhancements
In SQL Server 2000 and earlier versions, TOP allows you to limit the number of rows returned as a number or a percentage in SELECT queries. As of SQL Server 2005, you can use TOP in DELETE, UPDATE, and INSERT queries and can also specify the number (or percentage) of rows by using variables or any valid numeric returning expression (such as a subquery). The main reason for allowing TOP with DELETE, UPDATE, and INSERT was to replace the SET ROWCOUNT option, which SQL Server traditionally didn’t optimize very well.
You can specify the TOP limit as a literal number or an expression. If you’re using an expression, you must enclose it in parentheses. The expression should be of the bigint data type when you are not using the PERCENT ...
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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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