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Date:   Tue, 16 Jul 2002 09:48:25 -0400
Reply-To:   "Richard A. DeVenezia" <radevenz@IX.NETCOM.COM>
Sender:   "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:   "Richard A. DeVenezia" <radevenz@IX.NETCOM.COM>
Organization:   MindSpring Enterprises
Subject:   Re: link between two datasets...
Content-Type:   text/plain;

"tin-shun-jimmy chan" <jimmy.chan@HEC.CA> wrote in message news:bbbd8bedaf.bedafbbbd8@hec.ca... > Hello, > > I want to know how to do something in one dataset according to some > conditions in another dataset. > > For example, if nb > 200 for the i-th year in one dataset, then delete > all the observations of the whole i-th year in another dataset. > > dataset 1 > > year nb > 1970 195 > 1980 205 > ... > > dataset 2 > year score > 1970 20 > 1970 30 > 1970 35 > 1980 10 > 1980 15 > 1980 06 > ... > > So I want to delete all the 1980's observations in dataset 2 according > to dataset 1. > > Thanks a lot. > > Jim

You can use SQL to delete rows in place You can use DATA;MODIFY; to delete rows in place You can use DATA;SET; to create new dataset with rows deleted

Here is SQL

delete from TWO where year in (select year from ONE where nb > 200);

If you want to simply process the data through your 'nb>200' perspective (while leaving original data intact), consider using a view

create view TWO_with_NB_LE_200 as select * from TWO where year in (select year from ONE where NB<=200)

-- Richard A. DeVenezia http://www.devenezia.com/downloads/sas/macros/#sas2xls Use Perl to create an Excel file containing one worksheet per SAS dataset


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