Kathi Kellenberger


SQLServerCentral Editorial

How SQL Server Can Just Go Faster

It’s rare to get a call from a customer telling you that the application is fast today and thanks for taking such good care of the database. Instead, you are more likely to hear complaints when things go wrong like slow running queries and timeouts. There is a lot to consider when trying to figure […]

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2019-11-30

585 reads

SQLServerCentral Editorial

A Faster tempdb

I like to call tempdb the “workhorse” of SQL Server. I’ve heard some other people call it other terms that were not so flattering, but since I like to keep things positive, I’ll stick with workhorse. SQL Server uses tempdb for many things. The obvious uses are temp tables and table variables, but tempdb is […]

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2019-11-02

1,144 reads

SQLServerCentral Editorial

Which Service in Azure Should You Use for SQL?

I remember when Azure SQL Database was first released in 2010. Microsoft has tweaked the name a couple of times over the years, and back then it was called SQL Azure. The largest database you could create was just 50 GB, and there were quite a few restrictions, such as heaps not being supported. Since […]

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2019-10-05

454 reads

SQLServerCentral Editorial

Your chance to speak at PASS Summit

When I decided to switch careers about 25 years ago, I had no idea how far I would go in tech. I just wanted to leave the profession for which I had trained and become a developer. My goal was to make the switch by the end of 1998. It actually happened in the summer […]

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2019-09-07

131 reads

SQLServerCentral Editorial

SQL Server 2019 CTP 3.2 Available

Microsoft announced CTP 3.2 for SQL Server 2019 just a few days ago, but many people working with SQL Server don’t care about this. I run into people at user group meetings and SQL Saturdays who are stuck supporting versions as old as SQL Server 2000, and SQL Server 2008 R2 is still prevalent. I’m […]

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2019-07-27

721 reads

SQLServerCentral Editorial

Microsoft and Oracle Cloud Partnership

Many of us checked to make sure it wasn’t April Fools Day a couple of years ago when Microsoft announced that SQL Server 2017 would run on Linux. This means that some shops who want to run SQL Server, but not Windows Server, now can. But it also means that SQL Server professionals need to […]

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2019-06-15

208 reads

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Create an HTML Report on the Status of SQL Server Agent Jobs

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We Should Demand Better

By Steve Jones - SSC Editor

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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