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proc sql, join on multiple conditions

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Frequent Contributor
Frequent Contributor
Posts: 76

proc sql, join on multiple conditions

Hello,

 

I tried to join two tables using left join, which is a one to mutiple joins based on the two conditions, however the date condition was not applied.  I am wondering what is the reason.  Thank you !

 

proc sql;
create table temp1 as
select a.PatientID, a.AdministeredDate, 
b.TestDate, b.TestResult, (a.AdministeredDate -b.testdate) as dif_admin_test
from admindate as a
left join wgt as b
on a.patientid = b.patientid and (a.AdministeredDate -b.testdate) <= 7
order by patientid, AdministeredDate, TestDate;
quit;

Frequent Contributor
Frequent Contributor
Posts: 76

Re: proc sql, join on multiple conditions

Find the answers, I should use:

0<= (a.AdministeredDate -b.testdate) <= 7

Super User
Posts: 10,516

Re: proc sql, join on multiple conditions

What makes you believe the data condition was not applied? Provide some example input data that duplicates the behavior.

 

You may be interested in attempting this:

 

proc sql;
create table temp1 as
select a.PatientID, a.AdministeredDate, 
b.TestDate, b.TestResult, (a.AdministeredDate -b.testdate) as dif_admin_test
from admindate as a
left join wgt as b
on a.patientid = b.patientid

where a.AdministeredDate -b.testdate <= 7
order by patientid, AdministeredDate, TestDate;
quit;

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