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The literal string value 'empty_result' won't be returned because the corresponding predicate ("WHERE 1<>1") evaluates to false so I assume you're asking why one row is returned inste… (View Post)1
Data is resegmented to get it where it needs to be. For example, consider a query that computes the number of trades for each stock symbol. The trades for any one company must eventually be processed… (View Post)1