Complete SAS Programming Guide - Learn SAS and Become a Data Ninja - Types of Indices

The video tutorial explains the concept of indexes in data management, focusing on simple and composite indexes. A simple index involves a single variable, while a composite index uses multiple variables to create a unique value. The tutorial provides examples and code snippets to illustrate how to create these indexes, emphasizing the need for unique names in composite indexes.

What is a simple index based on?

• Multiple variables

• A single variable

• A combination of datasets

• A unique identifier

How does a composite index differ from a simple index?

• It requires no variables

• It merges values from multiple variables

• It is based on a unique identifier

• It uses a single variable

What is necessary when creating a composite index?

• Using only one variable

• Combining datasets

• Specifying a unique index name

• Using the same name as the variable

Which of the following is an example of a composite index?

• Index based on last name only

• Index based on first name only

• Index with no variables

• Index combining first name and last name

What is a key requirement for naming a composite index?

• It must be unique

• It must be the same as the dataset name

• It must be a common name

• It must be numeric