Marc Beacom

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PASS Summit 2013

PASS Summit is the world's largest and most intensive technical training conference for Microsoft SQL Server and BI professionals. But more...

2013-06-09

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We Should Demand Better

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Estimated Rows

By Steve Jones - SSC Editor

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Question of the Day

Estimated Rows

I have two calls to the GENERATE_SERIES TVF in this code: 

SELECT   TOP 10 gs.value
FROM     GENERATE_SERIES(1, 10) AS gs
ORDER BY NEWID ()
OPTION (RECOMPILE);
go
DECLARE @a int = 10;
SELECT   TOP (@a) gs.value
FROM     GENERATE_SERIES(1, @a) AS gs
ORDER BY NEWID ()
OPTION (RECOMPILE);
In the actual query plans, what is the estimated number of rows for each batch?

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