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Why Does My Job Run Soooo Sloooowly...?
Almost every operation you are able to perform using SAS® software can be achieved in many different ways, each with their own advantages and disadvantages. It is not always possible to predict the disadvantages, as a basic operation may be suitable in one circumstance, but may be totally inappropriate in another. Using SAS/ACCESS® software and PROC SQL there are a wide variety of alternative methods, but, in general, only one is likely to give a solution and a fast response time. This paper explores these choices and gives an insight into how to determine the most efficient approach.
You can visit my own web site to download the latest versions of the paper from.
This paper was expanded into a chapter in my book Saving Time and Money using SAS published by SAS Publishing in 2007.