Customer | Product | amount |
Paul | apple | 2 |
Paul | banana | 5 |
Paul | apple | 3 |
James | banana | 2 |
James | grape | 5 |
James | banana | 3 |
Here is the table I have.. I have tried to simplify the questions so you understand what i am doing. Trying to create a data step that sums up all the products of apple.. if apple is not in the list for paul then return the banana amount.
Here's one approach ... note that these are tools you will need to master in the long run.
proc summary data=have nway;
var amount;
class customer product;
where product in ('apple', 'banana');
output out=totals (keep=customer product amount) sum=;
run;
data want;
set totals;
by customer;
if last.customer;
run;
Note that the data set TOTALS will automatically be in order BY CUSTOMER PRODUCT. So if "banana" is there, it will be the last one for a CUSTOMER. If not, "apple" will be the last one.
Good luck.
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