LISTSERV at the University of Georgia
Menubar Imagemap
Home Browse Manage Request Manuals Register
Previous messageNext messagePrevious in topicNext in topicPrevious by same authorNext by same authorPrevious page (February 2001, week 3)Back to main SAS-L pageJoin or leave SAS-L (or change settings)ReplyPost a new messageSearchProportional fontNon-proportional font
Date:   Tue, 20 Feb 2001 09:04:05 -0500
Reply-To:   Nigel Tufnel <dousk8@HOTMAIL.COM>
Sender:   "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:   Nigel Tufnel <dousk8@HOTMAIL.COM>
Subject:   Wanted: One pass summary solution
Content-Type:   text/plain; format=flowed

I have a data set that I want to summarize by day. I use two primary columns "startdate" and "completedate". I want the count the number of starts and completes by day. To do this I summarize the data set twice (once by startdate and again by completedate) and merge the two.

This data set has millions of records and a few hundred other variables. Is there a way to get the desired results in one pass?

The data set looks like (among other columns):

startdate completedate 1/1/01 1/1/01 1/1/01 1/1/01 1/1/01 1/3/01 1/2/01 1/2/01 1/2/01 1/3/01 1/2/01 1/4/01 1/2/01 1/4/01 1/3/01 1/3/01 1/3/01 1/3/01 1/3/01 1/4/01 1/3/01 1/4/01 1/3/01 1/5/01

The desired result is:

date starts completes 1/1/01 3 2 1/2/01 4 1 1/3/01 5 4 1/4/01 0 4 1/5/01 0 1

Like I mentioned, the two pass solution is:

proc means data = source nway noprint missing; class startdate; var _whatever_; output out=starts(rename=(_freq_ = starts startdate = date)) sum=; run;

proc means data = source nway noprint missing; class completedate; var _whatever_; output out=completes(rename=(_freq_ = completes completedate = date)) sum=; run;

data summ; merge startdate completedate ; by date; run;

A one pass solution here could save a few hours. Any Ideas?

Thanks, Nigel _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com


Back to: Top of message | Previous page | Main SAS-L page