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Microsoft® SQL Server 2008 R2 Unleashed
book

Microsoft® SQL Server 2008 R2 Unleashed

by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
September 2010
Intermediate to advanced content levelIntermediate to advanced
1704 pages
111h 8m
English
Sams
Content preview from Microsoft® SQL Server 2008 R2 Unleashed

The NTILE Function

The NTILE function assigns a ranking value by separating the result rows of a query into a specified number of approximately even-sized groups. Each group of rows is assigned the same ranking number, starting with 1 for the first group, 2 for the second, and so on. You specify the number of groups you want the result set divided into as the argument to the NTILE function. The number of rows in a group is determined by dividing the total number of rows in the result set by the number of groups. If there’s a remainder, n, the first n groups have an additional row assigned to them. Listing 43.48 provides an example of using the NTILE function, so you can compare it to the ROW_NUMBER function.

Listing 43.48 Using the NTILE Function ...

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Publisher Resources

ISBN: 9780768696585Purchase book