July 2015
Intermediate to advanced
482 pages
13h 28m
English
Content preview from SAS 9.4 SQL Procedure User's Guide, Second Edition, 2nd Edition
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Output 5.1 Resetting PROC SQL Options with the RESET Statement
Improving Query Performance
Overview of Improving Query Performance
There are several ways to improve query performance, including the following:
• using indexes and composite indexes
• using the keyword ALL in set operations when you know that there are no duplicate
rows, or when it does not matter if you have duplicate rows in the result table
• omitting the ORDER BY clause when you create tables and views
• using in-line views instead of temporary tables (or vice versa)
• using joins instead of subqueries
• using WHERE expressions to limit the size of result tables that are created with ...
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