SQL Query to retrieve highest item up to a point in a group
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Published on 2010-03-11T00:11:30Z
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The best way of describing this is I have a table of people with their names and ages. Assume that people with the same surname are from the same family. I need a query in oracle which will retrieve a list of the oldest person in each family, but not older than a certain age.
Table: person
name surname age
===============================
James Smith 23
Sarah Powell 17
Barry Smith 31
Mark Smith 35
Mary Smith 18
Bob Powell 30
How do I retrieve the oldest person in each family under 30?
Results I'm after
name surname age
===============================
James Smith 23
Sarah Powell 17
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