Complete SAS Programming Guide - Learn SAS and Become a Data Ninja - BY Statement (Sorting Variables, While Exploiting Y

The video tutorial explains how to use the BY statement in SAS to sort variables and utilize indexes. It covers the rules for using the BY statement effectively, demonstrates importing a dataset and creating an index, and shows how to verify if the index is utilized. The tutorial also discusses scenarios where SAS may not use the index, such as when sorting by descending order or by other variables.

What is the primary purpose of the BY statement in SAS?

• To sort variables

• To delete variables

• To filter data based on conditions

• To create new variables

Which SAS procedure is used to create an index on a variable?

• PROC SORT

• PROC PRINT

• PROC DATASETS

• PROC MEANS

How can you verify if an index is being utilized in SAS?

• By running PROC CONTENTS

• By using the WHERE statement

• By checking the output dataset

• By using the OPTIONS statement with MGLEVEL

What happens if you sort by descending order using the BY statement?

• The variables are renamed

• The index is not utilized

• The index is utilized

• The dataset is deleted

In what scenario will SAS not utilize an index when using the BY statement?

• When using PROC PRINT

• When the key variable is not the first in the BY statement

• When sorting by multiple variables with the key variable first

• When the key variable is first