In hash join for testing purposes I do need to use for only one record out of dataset. I mean how the look up process or join would be by using one ID. For eaxmplae in proc sql left join
proc sql;
create table test as
select *
from table1
left join
table2
where table1.id=4 and table1.id=table2.id;
run;
data match_on_movie_titles(drop=rc);
if 0 then set sasuser.flightschedule sasuser.flightattendants; /* load variable properties into hash tables */
if _n_ = 1 then do;
declare Hash MatchTitles (dataset: "sasuser.flightattendants"); /* declare the name MatchTitles
for hash */
MatchTitles.DefineKey ("EmpID"); /* identify variable to use as key */
MatchTitles.DefineData (
"EmpID","JobCode","LastName","FirstName"); /* identify columns of data */
MatchTitles.DefineDone (); /* complete hash table definition */
end;
set sasuser.flightschedule(where=(EmpID='1113'));
if MatchTitles.find(key:EmpID)=0 then output; /* lookup TITLE in MOVIES table
using MatchTitles hash */
run;
Hi, if I understand you correctly:
blah blah blah
yourhash.definekey('id');
blah blah blah
rc=yourhash.find(key:4);
blah blah blah
Regards,
Haikuo
@HaiKuo
would you change this code for any one EMPID?
you can find the data sets in your sasuser library.
data match_on_movie_titles(drop=rc);
if 0 then set sasuser.flightschedule sasuser.flightattendants; /* load variable properties into hash tables */
if _n_ = 1 then do;
declare Hash MatchTitles (dataset:"sasuser.flightattendants"); /* declare the name MatchTitles
for hash */
MatchTitles.DefineKey ("EmpID"); /* identify variable to use as key */
MatchTitles.DefineData (
"EmpID","JobCode","LastName","FirstName"); /* identify columns of data */
MatchTitles.DefineDone (); /* complete hash table definition */
end;
set sasuser.flightschedule;
if MatchTitles.find(key:EMPID) = 0 then output; /* lookup TITLE in MOVIES table
using MatchTitles hash */
run;
data match_on_movie_titles(drop=rc);
if 0 then set sasuser.flightschedule sasuser.flightattendants; /* load variable properties into hash tables */
if _n_ = 1 then do;
declare Hash MatchTitles (dataset: "sasuser.flightattendants"); /* declare the name MatchTitles
for hash */
MatchTitles.DefineKey ("EmpID"); /* identify variable to use as key */
MatchTitles.DefineData (
"EmpID","JobCode","LastName","FirstName"); /* identify columns of data */
MatchTitles.DefineDone (); /* complete hash table definition */
end;
set sasuser.flightschedule(where=(EmpID='1113'));
if MatchTitles.find(key:EmpID)=0 then output; /* lookup TITLE in MOVIES table
using MatchTitles hash */
run;
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