Date: Wed, 19 Jul 2006 07:47:01 -0400
Reply-To: "Richard A. DeVenezia" <rdevenezia@WILDBLUE.NET>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: "Richard A. DeVenezia" <rdevenezia@WILDBLUE.NET>
Subject: Re: case statements with else as null
> Hi - I have the following code in SQL which I am trying to convert to
> SAS sql in proc sql:
> (CASE WHEN (tran_date BETWEEN '01-MAY-2005' AND
> THEN customer_number
> ELSE null
> END)) AS transactors
> from tblCustomer
> the idea is that a distinct count is produced when the transaction
> date is between the two dates.
> The piece of code I am trying to translate to SAS is the "ELSE null" -
> what do I put instead of null. doing "else missing" doesn't work.
> Incidentally if I comment out the "else null" the log file says values
> translated to missing which is what I want.
First concern is the dates being specified as plain strings instead of date
literals. Is your tran_date variable a numeric containing a SAS date value
or a string containing characters that humans interpret as dates?
You can SUM a logical condition (which yields 1 for true and 0 for false).
This sample uses date literals.
SUM (tran_date BETWEEN '01MAY2005'd AND '01MAY2006'd) as nTransactions label
= "Number Of Transactions In Date Range Of Pointy Haired Interest"
Richard A. DeVenezia