MySQL COUNT Scalar Subquery Optimization: The Complete Guide
This article demonstrates how optimizing COUNT subqueries to IN clauses boosts MySQL performance by 99%, with detailed examples and execution plan analysis.
Rebooter.S
Read More
5 min
Tag: MySQL
39 posts
Why MySQL and PostgreSQL lead open source database innovation?
Opensource database MySQL PostgreSQL lead innovation with speed, reliability, and advanced features for scalable, secure data management.
SQLFlash
Read More
17 min
Migrating MySQL to PostgreSQL Made Easy for Beginners
Easily migrate MySQL PostgreSQL databases with step-by-step guidance, tool selection tips, and solutions for common migration issues.
SQLFlash
Read More
13 min
PostgreSQL 18 vs MySQL 9.5 Performance and Scalability Compared
PostgreSQL MySQL compared: PostgreSQL 18 outperforms MySQL 9.5 in speed, scalability, and handling high-concurrency workloads for large projects.
SQLFlash
Read More
13 min
Step by Step Guide to Migrating MySQL to Oracle
Migrate MySQL to Oracle with step-by-step guidance on schema conversion, data transfer, and minimizing downtime for MySQL Oracle projects.
SQLFlash
Read More
12 min
Why MySQL 8.0 Still Matters in 2025 and Beyond?
MySQL 8.0 remains vital in 2025 for security, speed, and scalability. Prepare for its end-of-life in 2026 and plan your upgrade path early.
SQLFlash
Read More
9 min
How to Migrate MySQL to PostgreSQL Using Free Tools
Migrate MySQL PostgreSQL databases using free tools like pgLoader, mysql_fdw, and mysqldump. Follow step-by-step guidance for a smooth, reliable migration.
SQLFlash
Read More
9 min
How to Upgrade from MySQL 8.0 to 8.4 LTS?
MySQL Update guide: Safely upgrade from MySQL 8.0 to 8.4 LTS with step-by-step instructions, compatibility checks, and data protection tips.
SQLFlash
Read More
10 min
The Best Cloud MySQL Services for 2025: AWS vs Azure vs GCP
Compare AWS Azure GCP MySQL Cloud services for 2025 on performance, pricing, and integration to choose the best managed MySQL solution for your needs.
SQLFlash
Read More
9 min
GROUP BY Clause Elimination
Removing redundant GROUP BY clauses boosts MySQL performance 580x through primary key index optimization.
Rebooter.S
Read More
4 min