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Re: st: uniqmaster option with merge


From   Svend Juul <SJ@SOCI.AU.DK>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: uniqmaster option with merge
Date   Fri, 20 Jun 2008 14:28:37 +0200

Iva wrote:

I have an issue with the merge options.  I want to force the merge to  
take the match variable from the master file since it is not an  
unique identifier in the using file.  In other words, I want to all  
all observations that have the same hqduns as those in the master  
file.  But the option uniqmaster gives me the comment below as if I  
never even attached the option.  And the output shows that it did not  
merge anything from the using file.  Any suggestions?
I have up-to-date stata 10.

. merge hqduns using sm_NETS, uniqmaster
variable hqduns does not uniquely identify observations in sm_NETS.dta

===================================================================

The message

   variable hqduns does not uniquely identify observations in
sm_NETS.dta

is not an error message, but just informs you about the fact which may
be of interest.

If the -merge- did not happen, there must be other reasons - I will 
refrain from guesswork.

Hope this helps
Svend


__________________________________________

Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000  Aarhus C, Denmark
Phone:  +45 8942 6090
Home:   +45 8693 7796
Email:  sj@soci.au.dk
__________________________________________ 

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