Based on SAS Programming 1: Essentials training book, the difference between PROC MEANS and PROC SUMMARY are:
- PROC MEANS:
- The PRINT option is set by default, displays output
- Omitting the VAR statement analyzes all the numeric variables
PROC SUMMARY:
- The NOPRINT option is set by default, displays no output
- Omitting the VAR statement will produce only simple count of observations
PROC TABULATE is merely different in usage, more to produce two or more dimensional report(s)