SAS Certification Prep Guide: Base Programming for SAS 9, Third Edition

Additional Features

The DATA step provides a large number of other programming features for manipulating data when you combine data sets. For example, you can

• use IF-THEN/ELSE logic to control processing based on one or more conditions
• specify additional data set options
• perform calculations
• create new variables
• process variables in arrays
• use SAS functions
• use special variables such as FIRST. and LAST. to control processing.

You can also combine SAS data sets in other ways:

• You can perform one-to-one merging, which creates a data set that contains all of the variables and observations from each contributing data set. Observations are combined based on their relative position in each data set.

  One-to-one ...