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Connect to PostgreSQL as an External Data Source using PolyBase

PolyBase is a new feature of SQL Server that allows you to connect to relational and non-relational data. You can run queries on any external data sources you might have, such as Oracle, PostgreSQL, Salesforce, MongoDB, Hadoop, etc. When paired with the CData ODBC Driver for PostgreSQL, you get access to your PostgreSQL data directly […]

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Learning Is Challenging, So, Forgive Yourself

In addition to trying to get better at SQL Server, Redgate Software, and all the various aspects of my job, I'm also trying to get better at this whole human interaction thing AND I'm working on trying to learn PostgreSQL much more deeply. Whew! Yeah, may not seem like a whole lot, but I assure […]

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We Should Demand Better

By Steve Jones - SSC Editor

Comments posted to this topic are about the item We Should Demand Better

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