James Serra

James works at Microsoft as a big data and data warehousing solution architect where he has been for most of the last nine years. He is a thought leader in the use and application of Big Data and advanced analytics, including data architectures such as the modern data warehouse, data lakehouse, data fabric, and data mesh. Previously he was an independent consultant working as a Data Warehouse/Business Intelligence architect and developer. He is a prior SQL Server MVP with over 35 years of IT experience. He is a popular blogger (JamesSerra.com) and speaker, having presented at dozens of major events including SQLBits, PASS Summit, Data Summit and the Enterprise Data World conference. He is the author of the book “Deciphering Data Architectures: Choosing Between a Modern Data Warehouse, Data Fabric, Data Lakehouse, and Data Mesh”.

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Blog Post

Introduction to Hadoop

Hadoop was created by the Apache foundation as an open-source software framework capable of processing large amounts of heterogeneous data-sets in...

2014-03-11 (first published: )

8,311 reads

Blog Post

PolyBase explained

PolyBase is a new technology that integrates Microsoft’s MPP product, SQL Server Parallel Data Warehouse (PDW), with Hadoop.  It is designed to...

2014-02-25 (first published: )

18,154 reads

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Blogs

A Broken Copilot Query

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I was testing the new SSMS (v22 Preview 3) with Copilot and ran into...

SQL Server Alerts

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Don’t Let Trouble Sneak Up on You   Most SQL Servers run quietly. Until...

Prompt AI helping with Auditing

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I had a conversation with a customer asking this question: how can I tell...

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Forums

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

By Nisarg Upadhyay

Comments posted to this topic are about the item Create an HTML Report on...

Collation errors...what is best way to deal with it?

By water490

Hi I have a SP that occasionally get this error: Cannot resolve the collation...

Was the index created or not?

By water490

Hi everyone I am getting an error when I create the index but I...

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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 in SQL Server 2022?

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