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Ivy
Quartz | Level 8 Ivy
Quartz | Level 8

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;

2 REPLIES 2
Ivy
Quartz | Level 8 Ivy
Quartz | Level 8
Find the answers, I should use:

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

ballardw
Super User

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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