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metro
Fluorite | Level 6

I often merge data and use the in= processing to create new variables (example below).  It looks like this could be done with the case statement in SQL, but I can't get it to work.

data test;

merge one (in=inone)

       two (in=intwo);

by ID;

if inone and not intwo then Notfound=1;

else Notfound=0;

run;

1 ACCEPTED SOLUTION
2 REPLIES 2
RW9
Diamond | Level 26 RW9
Diamond | Level 26

Hi,

proc sql;

     create table TEST as

     select     COALESCE(A.ID,B.ID) as ID,

                    case     when A.ID is null or B.ID is null then 1

                                 else 0 end as NOTFOUND

     from        ONE A

     full join    TWO B

     on           A.ID=B.ID;

quit;

The full join will create a list of all rows from one or the other, with the first missing if not in second and viceversa.  So when either is null will highlight where missing.

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