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st: "unique" with "by"

From   "Shige Song" <[email protected]>
To   [email protected]
Subject   st: "unique" with "by"
Date   Wed, 19 Apr 2006 22:57:41 +0800

Dear Collegues,

I want to get count of unique values of a variable and I want to use
it conjuction with "by" like this:

sort hhid
by hhid: unique id

But unfortunately the UNIQUE command does not allow the use of "by".
Are there other options? Thanks!


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