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st: duplicates drop

From   <>
To   <>
Subject   st: duplicates drop
Date   Wed, 16 Jul 2008 11:07:45 +0200

Dear all,

I merged two dataset for a pre-study. In this study, I can not uniquely
identify some cases since I do not have access to all variables. 
How can I drop all cases which have duplicates? I know about the command
"duplicates drop". However I would like to drop all cases which are not
unique, not only the duplicates. 

Thanks for your help

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