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st: Simple tab needed but multiple records

From   Joseph Wagner <>
Subject   st: Simple tab needed but multiple records
Date   Fri, 05 Oct 2007 15:16:29 -0400

I realize this is going to sound simple and usually I can find my answer in the archives for statalist or elsewhere online but I am stumped on this one. I have a dataset of x-ray records with multiple records per patient. The records consist of id, age, and sex and I need to know how many persons had an x-ray when they were between the age of 17 and 25 AND when when they were over 30. My attempts have been crude and I know there has to be a simple yet elegent way to do this.

Thanks for you help.

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