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
😉
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