🔄 PROC SORT in SAS: Sorting Data and Removing Duplicates Using NODUP and NODUPKEY Options

📌 What is PROC SORT in SAS?

PROC SORT is a procedure used to sort a SAS dataset by one or more variables. Sorting is essential for data preparation, reporting, and ensuring that other procedures work as expected.

✅ Basic Syntax:

proc sort data=input_dataset out=output_dataset;
  by variable1 variable2;
run;

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