One-to-one merging combines observations from two or more SAS data sets into a single observation in a new data set. To perform a one-to-one merge, use the MERGE statement without a BY statement.

Nov 24, 2023 · 5 Ways To Combine and Append SAS Datasets 1. Appending Or Concatenating Two Datasets Vertically – Stacking The Datasets. You can append data vertically using the SET statement in the data step. It reads an observation from one or more SAS data sets. You can also say, it stacks the multiple datasets one after another.

Jan 3, 2020 · Concatenating data sets is combining two or more data sets by stacking them one after the other to form a single data set. The number of observations in the new data set is the sum of the number of observations in the original data sets.

Mar 24, 2025 · This SAS software tutorial shows how to stack, append, and merge datasets from a data step.

Oct 8, 2009 · You must list each file separately on the SET statement. A utility SAS macro to generate the SET parameters can look something like: %MACRO GENSET(FILEPFX=, LOW=, HIGH=);

In SAS, datasets can be combined using PROC APPEND, SET statement and PROC SQL UNION methods. For example, you have multiple human records files from various departments of your company and you are asked to combine them so that there would be a single file containing information of all the departments.

Dec 20, 2020 · You can use the SET statement to append data sets with different column names. With the DATA statement, you define the name of the new table and with the SET statement, you specify which tables you want to combine.

In the simplest situation, the data sets that you concatenate contain the same variables (variables with the same name). In addition, the type, length, informat, format, and label of each variable match across all data sets.

This tutorial explains how to append datasets using PROC SQL in SAS, along with examples.

In the following code snippet, a data set called DataB is created and its source data set is DataA. The set statement can be used concatenate or stack data sets vertically. In the following code, Big is simply a vertical stack of Small1 and Small2.