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SQL SERVER – Modern Explicit JOIN Syntax – A Brief Note

September 22, 2023
Pinal Dave
SQL Tips and Tricks
SQL Joins

Over time, SQL has evolved and offers two distinct styles for performing JOIN operations: the old-style comma-separated join and the more modern explicit JOIN syntax.

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SQL SERVER – Making Recursive Parent-Child Queries Efficient

August 14, 2023
Pinal Dave
SQL Performance
Challenge, Recursive, SQL Joins

One puzzle is finding out how many employees each manager is responsible for in a company. Let us Make Recursive Parent-Child Queries Efficient.

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Avoid Join Hints

Avoid Join Hints – SQL in Sixty Seconds #172

June 8, 2021
Pinal Dave
SQL Video
Execution Plan, SQL in Sixty Seconds, SQL Joins, SQL Server

Question: If they can change the join hints to improve the performance of the query. Well, the reality is that I always Avoid Join Hints.

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Join Type

SQL SERVER – Change Join Type for Query

April 22, 2021
Pinal Dave
SQL Tips and Tricks
Execution Plan, SQL Joins, SQL Operator, SQL Scripts, SQL Server, SQL Server Management Studio, SSMS

“Can I Change Join Type for Query?” I was recently asked this during  Comprehensive Database Performance Health Check. Of course Yes!

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disable adaptive

SQL SERVER – Disable Adaptive Joins

March 30, 2021
Pinal Dave
SQL Performance
Execution Plan, SQL Joins, SQL Scripts, SQL Server

My client sent me an interesting scenario where a query with adaptive join was performing badly. Let us learn how to disable adaptive joins. 

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Adaptive Join

SQL SERVER – Enable Adaptive Join

March 26, 2021
Pinal Dave
SQL Performance
Execution Plan, SQL Joins, SQL Scripts, SQL Server

Let us learn how we can enable the adaptive join feature in SQL Server. I often discuss this during Comprehensive Database Performance Health Check.

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Adaptive Threshold Rows

SQL SERVER – Adaptive Threshold Rows

March 25, 2021
Pinal Dave
SQL Tips and Tricks
Execution Plan, SQL Joins, SQL Scripts, SQL Server

Today we are going to learn about what drives the decision to join Adaptive Join. Well, the answer is very simple – Adaptive Threshold Rows.

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