Hi Experts,
I want to left join two tables (table A and table B).
Table A
Date_ID | ID | Flag |
20190202 | 14715 | Y |
20190203 | 14715 | Y |
20190204 | 14715 | Y |
20190202 | 888 | Y |
20190203 | 888 | Y |
Table B
Date_ID | ID | CID |
20190202 | 14715 | 222 |
20190203 | 14715 | 222 |
20190204 | 14715 | 222 |
20190202 | 14715 | 333 |
20190203 | 14715 | 333 |
20190204 | 14715 | 333 |
20190202 | 1295128 | 444 |
20190203 | 1295128 | 444 |
20190204 | 1295128 | 444 |
Code I'm using
data w(drop=rc);
if _N_ = 1 then do;
dcl hash h(dataset : "a",hashexp : 20);
h.definekey("ID","DATE_ID");
h.definedata("ID","Flag");
h.definedone();
end;
set b;
if 0 then set a;
rc = h.find(key : ID, key : DATE_ID);
run;
Table W (What I am getting)
Date_ID | ID | CID | Flag |
20190202 | 14715 | 222 | Y |
20190203 | 14715 | 222 | Y |
20190204 | 14715 | 222 | Y |
20190202 | 14715 | 333 | Y |
20190203 | 14715 | 333 | Y |
20190204 | 14715 | 333 | Y |
20190202 | 1295128 | 444 | Y |
20190203 | 1295128 | 444 | Y |
20190204 | 1295128 | 444 | Y |
Table W (what I am expecting)
Date_ID | ID | CID | Flag |
20190202 | 14715 | 222 | Y |
20190203 | 14715 | 222 | Y |
20190204 | 14715 | 222 | Y |
20190202 | 14715 | 333 | Y |
20190203 | 14715 | 333 | Y |
20190204 | 14715 | 333 | Y |
20190202 | 1295128 | 444 | |
20190203 | 1295128 | 444 | |
20190204 | 1295128 | 444 |
Please help me correct error in my code.
Thanks in advance.
Try this
data w(drop=rc);
if _N_ = 1 then do;
dcl hash h(dataset : "a",hashexp : 20);
h.definekey("ID","DATE_ID");
h.definedata("ID","Flag");
h.definedone();
end;
set b;
if 0 then set a;
call missing(flag);
rc = h.find(key : ID, key : DATE_ID);
run;
Try this
data w(drop=rc);
if _N_ = 1 then do;
dcl hash h(dataset : "a",hashexp : 20);
h.definekey("ID","DATE_ID");
h.definedata("ID","Flag");
h.definedone();
end;
set b;
if 0 then set a;
call missing(flag);
rc = h.find(key : ID, key : DATE_ID);
run;
Anytime
Instead of
if 0 then set a;
set the required attributes (length of flag) in the _n_ = 1 block.
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