Introduction to Interleaving SAS Data Sets

Purpose

Interleaving combines individual sorted SAS data sets into one sorted data set. You interleave data sets by using a SET statement and a BY statement in a DATA step. The number of observations in the new data set is the sum of the number of observations in the original data sets.
In this section, you will learn how to use the BY statement, how to sort data sets to prepare for interleaving, and how to use the SET and BY statements together to interleave observations.

Prerequisites

Before continuing with this section, you should understand the concepts that are presented in the following sections:
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