2 data set t-test

[LauChiFung]

Data A

Variable  Type   Len  Format

Date        Num   8      Date9.

Return     Num   8      Best12.

Data B

Variable  Type   Len  Format

Date        Num   8      Date9.

Return     Num   8      Best12.

I want to do t-test with 2 sample var Return.

How can I do?

[Ksharp]

CODE NOT TESTED.

data have;
length dsn d $ 40;
set data_a data_b indsname=d;
dsn=d;
run;

proc ttest data=have;
 class dsn;
 var return;
run;