December 2014
Intermediate to advanced
858 pages
40h 10m
English
Content preview from SAS Certification Prep Guide, 4th Edition
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Summary
Text Summary
Using Indexes
An index is a SAS file
that is associated with a data set and that contains information about
the location and the values of key variables in the data set. Indexes
enable SAS to directly access specific observations rather than having
to read all observations sequentially. An index can be simple or composite.
Creating Indexes in the DATA Step
You can create an index at the same time that you create a data set by using the INDEX= option in the DATA statement. Both simple and composite indexes can be unique, if there are no duplicate values for any key variable in the data set. You can create multiple indexes on one data set. You can use the MSGLEVEL= system option to write informational messages to the SAS ...
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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.
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.