sql - SELECT TOP ... FROM UNION -


what best way select top n records union of 2 queries?

i can't do

select top n ...    (select ... table1     union     select ... table2)

because both queries return huge results need every bit of optimization possible , avoid returning everything. same reason cannot insert results #temp table first either.

i can't use set rowcount n either because may need group results , command limit number of grouped rows, , not underlying row selections.

any other ideas? thanks!

use top keyword inner queries also:

select top n ... (select top n... table1 union select top n... table2)

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