Just few examples:
-- selecting orw with maximum date
SELECT *
FROM SomeTable st1
JOIN (SELECT SomeID, MAX(SomeDateColumn) mxSomeDateColumn
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"The only true wisdom is in knowing you know nothing"
"O skol'ko nam otkrytiy chudnyh prevnosit microsofta duh!":-D
(So many miracle inventions provided by MS to us...)
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