SAS 9.4 SQL Procedure User's Guide, Third Edition, 3rd Edition

Computing Percentages within Subtotals

Problem

You want to analyze answers to a survey question to determine how each state

responded. Then you want to compute the percentage of each answer that a given state

contributed. For example, what percentage of all NO responses came from North

Carolina?

Background Information

There is one input table, called Survey, that contains the following data (the first ten

rows are shown):

data survey;

input State $ Answer $ @@;

datalines;

NY YES NY YES NY YES NY YES NY YES NY YES NY NO NY NO NY NO NC YES

NC YES NC YES NC YES NC YES NC YES NC YES NC YES NC YES NC YES NC YES

NC YES NC YES NC YES NC YES NC YES NC YES NC YES NC YES NC YES NC NO

NC NO NC NO NC NO NC NO NC NO NC NO NC NO NC NO NC NO NC NO

NC NO NC NO NC NO NC NO NC NO NC NO NC NO NC NO NC NO NC NO

NC NO NC NO NC NO PA YES PA YES PA YES PA YES PA YES PA YES PA YES

PA YES PA YES PA NO PA NO PA NO PA NO PA NO PA NO PA NO PA NO

PA NO PA NO PA NO PA NO PA NO PA NO PA NO PA NO PA NO PA NO

VA YES VA YES VA YES VA YES VA YES VA YES VA YES VA YES VA YES VA YES

VA YES VA YES VA YES VA YES VA YES VA YES VA YES VA YES VA YES VA NO

VA NO VA NO VA NO VA NO VA NO VA NO VA NO VA NO VA NO VA NO

VA NO VA NO VA NO VA NO VA NO VA NO

;

proc print data=Survey(obs=10);

title 'Sample Data for Subtotal Percentages';

run;

Computing Percentages within Subtotals 185

Output 6.7 Input Table for Computing Subtotal Percentages (Partial Output)

Solution

Use the following PROC SQL code to compute the subtotal percentages:

proc sql;

title1 'Survey Responses';

select survey.Answer, State, count(State) as Count,

calculated Count/Subtotal as Percent format=percent8.2

from survey,

(select Answer, count(*) as Subtotal from survey

group by Answer) as survey2

where survey.Answer=survey2.Answer

group by survey.Answer, State;

quit;

186 Chapter 6 • Practical Problem-Solving with PROC SQL