I Need Advice on Optimizing a Large Database Query

[nimeshaanethmini]

Hey guys.....

I am currently working on a project where I need to optimize a large SQL query that’s becoming quite slow. The database has millions of records, and the query involves several JOINs and subqueries.

I am relatively new to advanced SQL optimization techniques and would greatly appreciate any advice or best practices you could share. Specifically, I’m interested in learning more about:

Indexing: What are the most effective strategies for indexing large tables to improve query performance?
Query Structure: Are there any specific patterns or practices that can help in rewriting the query for better efficiency?
Tools and Techniques: Are there any tools you recommend for analyzing query performance and identifying bottlenecks?
I have not found any solution. Could anyone guide me about this? Any insights or examples would be incredibly helpful. Thanks in advance for your time and assistance!

Thanks in advance!


Respected community member!

 

[xavier.batlle]

Read Allen Browne's tips:

 

[theDBguy]

Hi. Welcome to AWF!

Here's the link to the above mentioned page.

Microsoft Access tips: Optimizing queries

How to get JET (the database engine in Microsoft Access) to execute queries quickly

www.allenbrowne.com

 

[isladogs]

More links:

1. Optimizing Access queries:

Speed Comparison Tests 8

This article covers various methods of optimising queries and the use of the JET ShowPlan feature. It is the eighth in a series of articles discussing various tests done to compare the efficiency of different approaches to coding. Example databases are provided so the tests can be done on your...

www.isladogs.co.uk

2. Optimizing queries in SQL Server: