sas - Data step merge PROC SQL equivalent flagging which table record was found in -



sas - Data step merge PROC SQL equivalent flagging which table record was found in -

i merge 2 info sets follows:

data ds3; merge ds1(in=in1) ds2(in=in2); mrgvar; if in1; if in2 flag=1; run;

if proc sql step instead, how can set "flag" variable above?

proc sql; create table ds3 select a.* ,b.* ,??? ds1 left bring together ds2 b on a.mrgvar=b.mrgvar; quit;

a mutual way utilize table alias bring together variable.

proc sql; create table ds3 select a.* ,b.* ,case when b.mrgvar null 0 else 1 end flag ds1 left bring together ds2 b on a.mrgvar=b.mrgvar; quit;

something effect - if b.mrgvar null/missing it's coming table a. (yes, can separately reference 2 though they're same , combined in result table.)

sas

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