Hi guys,
I have a question. I want to pull out distinct customer_id and certain (expiration) date from a table that contains history of expiration dates for certain bonuses.
PROC SQL;
create table work.datt as
select distinct t1.CONT_ID, max(t2.EXPIRE_DATE) FORMAT=DATETIME20. from CONTRACTS t1
inner join CONTRACT_HIST t2 on t2.CONT_ID = t1.CONT_ID;
QUIT;
But then it takes one, general max date and pulls out contracts only for this one, specific date. Same happens when I'm using function 'having date =max(date)'.
Could you please help out how to make it max(date) but separate for each customer?
thanks!
Yes, you haven't supplied any group by statement. Simplest method is to put your join in a subquery then the returned data group by CONT_ID:
proc sql; create table WORK.DATT as select distinct CONT_ID, max(EXPIRE_DATE) format=datetime20. from (select * from CONTRACTS T1 inner join CONTRACT_HIST T2 on T2.CONT_ID=T1.CONT_ID) group by CONT_ID; quit;
Obviously I can't test this as you haven't provided any test data.
Yes, you haven't supplied any group by statement. Simplest method is to put your join in a subquery then the returned data group by CONT_ID:
proc sql; create table WORK.DATT as select distinct CONT_ID, max(EXPIRE_DATE) format=datetime20. from (select * from CONTRACTS T1 inner join CONTRACT_HIST T2 on T2.CONT_ID=T1.CONT_ID) group by CONT_ID; quit;
Obviously I can't test this as you haven't provided any test data.
meaning for example i have:
id | date |
1 | 2016-01-01 |
1 | 2015-01-01 |
2 | 2018-03-01 |
3 | 2013-01-01 |
3 | 2015-01-01 |
4 | 2016-01-01 |
4 | 2017-01-01 |
4 | 2018-10-01 |
I want to have:
id | date |
1 | 2016-01-01 |
2 | 2018-03-01 |
3 | 2015-01-01 |
4 | 2018-10-01 |
what I received:
id | date |
1 | 2018-10-01 |
2 | 2018-10-01 |
3 | 2018-10-01 |
4 | 2018-10-01 |
Yep, did you try my code above?
ok I was dumb for few moments there, group by cont_id solved it. thanks a lot
😉
Don't miss out on SAS Innovate - Register now for the FREE Livestream!
Can't make it to Vegas? No problem! Watch our general sessions LIVE or on-demand starting April 17th. Hear from SAS execs, best-selling author Adam Grant, Hot Ones host Sean Evans, top tech journalist Kara Swisher, AI expert Cassie Kozyrkov, and the mind-blowing dance crew iLuminate! Plus, get access to over 20 breakout sessions.
Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
Find more tutorials on the SAS Users YouTube channel.