Hello,
I want to join table by id
Table A
id date price
1 20170101 10
1 20170102 12
2 20180401 8
2 20180402 5
Table B
id date price
1 20170103 15
2 20180405 4
want A and B
id date price
1 20170101 10
1 20170102 12
1 20170103 15
2 20180401 8
2 20180402 5
2 20180405 4
There are at least a half dozen ways to do this.
If you data sets are actually sorted by the Id and date and there are not any of the same dates in A and B then
data want; merge A B ; by id date; run;
is about the simplest.
If you have duplicates of Date for a given Id then you may want:
data want; set A B ; run; proc sort data=want; by id date; run;
There are at least a half dozen ways to do this.
If you data sets are actually sorted by the Id and date and there are not any of the same dates in A and B then
data want; merge A B ; by id date; run;
is about the simplest.
If you have duplicates of Date for a given Id then you may want:
data want; set A B ; run; proc sort data=want; by id date; run;
This isn't a join, as far as I understand SQL notation and syntax. This can be achieved in SQL using a UNION but it requires another pass to get the order correct. But SAS can interleave the records; I was taught the term collate, I digress. The datasets A and B I presume are properly sorted.
data want;
set a b;
by id date;
run;
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