Ah ha!You rock!!Is there any way to sort the columns now that I have the data I 
want?When I click on the column head, all the rows disappearMike

      From: Stephen Markson <[email protected]>
 To: [email protected] 
 Sent: Wednesday, October 14, 2015 1:56 PM
 Subject: [RBASE-L] - RE: extracting the most recent data
   
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div.yiv2542047982WordSection1 {}-->Get rid of rdate_ in the GROUP BY       
Regards,    Stephen Markson The Pharmacy Examining Board of Canada 416.979.2431 
x251    From: [email protected] [mailto:[email protected]]On Behalf Of Michael 
J. Sinclair
Sent: October-14-15 1:43 PM
To: Stephen Markson
Subject: [RBASE-L] - RE: extracting the most recent data    Hi Buddy, here is 
what i tried    bro (max(rdate_)) patnumbr cptcode service from todo0 group by 
rdate_ patnumbr cptcode service    instead of giving me just the last test, it 
gives me every test, as if it is ignoring the MAX function    What am I doing 
wrong?    Mike       From: Buddy Walker <[email protected]>
To: [email protected] 
Sent: Monday, October 12, 2015 8:54 PM
Subject: [RBASE-L] - RE: extracting the most recent data    Mike   You could 
try      SELECT  MAX(datecolumn), patientnumber,testcode from sometable group 
by patientnumber, testcode, datecolumn   Buddy   From:[email protected] 
[mailto:[email protected]]On Behalf Of Michael J. Sinclair
Sent: Monday, October 12, 2015 8:23 PM
To: [email protected]
Subject: [RBASE-L] - extracting the most recent data   Hi all   I have a very 
long skinny table, 3 columns.
A date, a patient number and test code.   I want to extract the rows that are 
the most recent test code for each patient.   If patient #3000 has had testcode 
# 80015 10 times over the last year, then I only want the most recent row for 
that testcode/patient combination   Is there a single command that can do that? 
  Mike    

  

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