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Introduction The analysis of blocking in SQL Server can be hard if the SQL Server instance has a high number of active connections. This analysis becomes complicated because busy instances could have more than one blocking connection, meaning that we could have more than just one blocking chain. For every group of blocked connections, we […]

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2021-02-04

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SQLServerCentral Article

How to Restore an Agent Job that was Dropped

Once upon a time, you had one job, well actually two jobs. The first SQL Server agent job was important, the other was a test. You have decided you do not need the test agent job. Quick right-click on a job name, remove, confirm, done. When you refreshed the list, the test job was still […]

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2021-02-02

7,002 reads

SQLServerCentral Article

How to Restore an Agent Job that was Dropped

Once upon a time, you had one job, well actually two jobs. The first SQL Server agent job was important, the other was a test. You have decided you do not need the test agent job. Quick right-click on a job name, remove, confirm, done. When you refreshed the list, the test job was still […]

You rated this post out of 5. Change rating

2021-02-02

609 reads

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We Should Demand Better

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Estimated Rows

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Estimated Rows

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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?

See possible answers