Help using Base SAS procedures

What is the Merge in this code doing?

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Posts: 1

What is the Merge in this code doing?

Hi,
I have the following code that takes a huge file houtpt073 and deletes all appropriate rows based off certain column headings (serv_type, provider_id) for all non-outpatient claims. I can follow the code until it gets to the merge statement, where I don't understand what is happening. I would like to be able to recreate this in Access. Can someone please explain the "then delete" portion?

DATA H1;
SET HF.HOUTPT073;

IF SERV_TYPE3 IN ('EMERGENCY');
RUN;

DATA H2;
SET HF.HOUTPT073;

IF SERV_TYPE1 IN ('OUTPATIENT');
IF SUBSTR(PROVIDER_ID,1,2) IN ('81','82') THEN DELETE;

RUN;

PROC SORT DATA=H1 NODUPKEY; BY CLAIM_NUMBER; RUN;
PROC SORT DATA=H2; BY CLAIM_NUMBER; RUN;

DATA HF.SMD2224Q;
MERGE H1(IN=A) H2(IN=B);
BY CLAIM_NUMBER;
IF A AND B THEN DELETE;
RUN;
Super Contributor
Posts: 281

Re: What is the Merge in this code doing?

It is deleting any record where the claim number exists in both data sets. (Or, it is keeping records for which the claim number exists in one, but not both, data sets)
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