April 2006
Intermediate to advanced
640 pages
16h 46m
English
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Chapter 7. TOP and APPLY
This chapter covers two query elements that might seem unrelated to each other. One element is the TOP option, which allows you to limit the number of rows affected by a query. The other is the new APPLY table operator, which allows you to apply a table expression to each row of another table expression—basically creating a correlated join. I decided to cover both in the same chapter because I find that quite often you can use them together to solve querying problems.
I’ll first describe the fundamentals of TOP and APPLY, and then follow with solutions to common problems using these elements.
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