topic Re: how do I merge 2 datasets on 2 different timestamps in SAS Programming

how do I merge 2 datasets on 2 different timestamps

stc200896 — Mon, 05 Jun 2017 15:27:28 GMT

I have two massive datasets that I need to merge. All of the fields are the same with the exception of the time field. I want to merge the two datasets where T1.time is within 30 minutes of T2.time. I have tried everything I can think of but that's probably not saying too much ;-). Here's a sample of data below...

DATA T1;
INPUT STORE KEY2 DATE TIME VAR3
DATALINES;
3 163003 03SEP2016 18:47 1;
RUN;

DATA T2;
INPUT STORE KEY2 DATE TIME VAR1 VAR2;
DATALINES;
3 163003 03SEP2016 18:33 1 1;
RUN;

DATA T3;

MERGE T2 (IN=A) T1;

BY STORE KEY2 DATE;

IF A;

IF.........;

RUN;

The final table should be a left join to T2 to pull in var3 from T1 if T1.time is within 30 minutes of T2.time.

I sincererly appreciate any help anyone could provide.

Thanks.

Re: how do I merge 2 datasets on 2 different timestamps

Jagadishkatam — Mon, 05 Jun 2017 15:36:50 GMT

Please try proc sql

proc sql;
create table want as select a.*,(a.time-b.time)/60 as t,b.var1,b.var2 from t1 as a left join t2 as b on 
a.store=b.store and a.key2=b.key2 and a.date=b.date having t<30;
quit;

Re: how do I merge 2 datasets on 2 different timestamps

kiranv_ — Mon, 05 Jun 2017 15:53:43 GMT

something like this should work

proc sql;
select a.*, var2
from t1 a
left join
t2 b
on a.store =b.store
and a.key2 =b.key2
and b.time between  a.time - '00:30't and a.time;
quit;

Re: how do I merge 2 datasets on 2 different timestamps

stc200896 — Mon, 05 Jun 2017 19:25:18 GMT

I tried both solutions and they both worked! Thank you so much!