SQL Server execution-plans-3 book cover

Free eBook: SQL Server Execution Plans, Third Edition

If a query is performing poorly, and you can't understand why, then that query's execution plan will tell you not only what data set is coming back, but also what SQL Server did, and in what order, to get that data. It will reveal how the data was retrieved, and from which tables and indexes, what types of joins were used, at what point filtering, sorting and aggregation occurred, and a whole lot more. These details will often highlight the likely source of any problem.

Blogs

Spark Connect Dotnet November 2024 Where are we?

By

All Spark Connect Posts Introduction There have been quite a few changes in the last...

A New Word: Ochisia

By

ochisia – n. the fear that the role you once occupied in someone’s life...

Create a Numbers Table in Power Query

By

This is a quick blog post, mainly so I have the code available if...

Read the latest Blogs

Forums

Writer methods in PowerQuery (LOL)

By pietlinden

I'm using PowerQuery in Excel on my desktop. (Yeah, I know you can do...

Need help with GROUP BY...

By iamjoe

Here's my data... I am trying to return total days in status for each...

Need help with GROUP BY...

By iamjoe

Here's my data... I am trying to return total days in status for each...

Visit the forum

Question of the Day

The Density Vector

When building statistics, there is the concept of density that refers to the duplicates in a table. How is this calculated?

See possible answers