BookmarkSubscribeRSS Feed
🔒 This topic is solved and locked. Need further help from the community? Please sign in and ask a new question.
cdubs
Quartz | Level 8

 

The below was prefaced by 

 

%let startdate = '01JAN1999'd;
%let elig_2010 = '31DEC2010'd;
....

Question 1 of 2: For above, why is there a 'd' after the date? Is this how data is typically stored?

Question 2 of 2: For below, I think its saying when svcdate >= 01JAN1999 but svcdate <= 31DEC2010, then do the subsequent thing. But I don't understand what "then 1 else 0 end as test_2010" means. Does that mean make the variable test_2010 into 1 if true, else not? Why is there an "end"?

 

 

proc sql; 
	create table hbsag_lab (rename=(enrolid=patient_id)) as
	select distinct enrolid, svcdate,
	case when &startdate. <=svcdate <= &elig_2010. then 1 else 0 end as test_2010

from clean_dataset (where=(lab_test=1));

quit;
1 ACCEPTED SOLUTION

Accepted Solutions
art297
Opal | Level 21

Your understanding is correct. As for the dates, quoting a date and then following it with a d converts the date to a SAS date, namely the number of days since January 1, 1960.

 

case statements, by definition, end with an end statement, followed by the variable name the selected/comuted values are assigned.

 

Art, CEO, AnalystFinder.com

 

View solution in original post

1 REPLY 1
art297
Opal | Level 21

Your understanding is correct. As for the dates, quoting a date and then following it with a d converts the date to a SAS date, namely the number of days since January 1, 1960.

 

case statements, by definition, end with an end statement, followed by the variable name the selected/comuted values are assigned.

 

Art, CEO, AnalystFinder.com

 

hackathon24-white-horiz.png

2025 SAS Hackathon: There is still time!

Good news: We've extended SAS Hackathon registration until Sept. 12, so you still have time to be part of our biggest event yet – our five-year anniversary!

Register Now

How to Concatenate Values

Learn how use the CAT functions in SAS to join values from multiple variables into a single value.

Find more tutorials on the SAS Users YouTube channel.

SAS Training: Just a Click Away

 Ready to level-up your skills? Choose your own adventure.

Browse our catalog!

Discussion stats
  • 1 reply
  • 9343 views
  • 1 like
  • 2 in conversation