Sum SAS

[mmea]

How do I sum up a column of values if it matches an if statement?

fx 

if variable = XX and variable2 = YY then sum variable

[PaigeMiller]

proc summary data=have(where=(variable=XX and variable2=YY));
var myvariable;
output out=sums sum=;
run;

[Kurt_Bremser]

In SQL

sum(case when var1 = "XX" and var2 ="YY" then var3 else 0 end)

[ballardw]

Data.

Example data is good.

Starting and desired result.

Since "sum" typically involves more than one value where the values currently reside is important.

With your "sum up column" then the order of data and such can become a very critical part of the solution.

So show us some data.