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POWhat are the benefits of left outer join vs nested aggregate selects to find the newest rows in a table?
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I'm doing: <pre><code>select * from mytable y where y.year = (select max(yi.year) from mytable yi where yi.person = y.person) </code></pre> Is that better or worse from a performance aspect than: <pre><code>select y.* from mytable y left outer join mytable y2 on y.year < y2.year and y.person = y2.person where y2.year is null </code></pre> The explain plan/anecdotal evidence is inconclusive so I am wondering if in general one is better than the other.
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<sql><oracle>
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What are the benefits of left outer join vs nested aggregate selects to find the newest rows in a table?
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