MinervaDB Blog: Mastering WebScale Database Infrastructure

Locating Hot I/O Objects in MySQL 8

Introduction MySQL is a robust and widely used relational database management system. However, like any complex software, it can encounter performance issues. Among the many factors affecting MySQL performance, I/O (Input/Output) operations play a critical […]

The Hidden Cost Drivers: How Suboptimal SQL Queries Inflate Your Amazon Redshift DBaaS TCO

Suboptimal SQL queries can have a significant negative impact on the Total Cost of Ownership (TCO) for your Amazon Redshift Database as a Service (DBaaS). In a cloud environment where you pay for what you […]

Cardinality in PostgreSQL: The Key to Query Performance Optimization

Cardinality in PostgreSQL and Its Impact on Query Performance In PostgreSQL, cardinality refers to the estimated number of distinct values in a column or the estimated number of rows returned by a query. Accurate cardinality […]

Fine-Tuning PostgreSQL: Understanding Selectivity and Cardinality Estimations

Deciphering PostgreSQL Query Optimization: Selectivity and Cardinality Estimation PostgreSQL’s query optimizer makes decisions about query plans based on selectivity and cardinality estimations. These estimations are critical for determining the most efficient way to retrieve data. […]

Mastering MariaDB Query Optimization: EXPLAIN in the Slow Query Log

Unlocking MariaDB Query Performance: EXPLAIN and Slow Query Log Introduction Understanding how queries are executed by a database system is paramount for database administrators and developers seeking to optimize performance. In particular, within the realm […]

Calculating Population Variance in Financial Data using MySQL 8: A Practical Guide

VAR_POP: Population Variance in MySQL Population Variance in MySQL 8: MySQL 8 introduced the VAR_POP() function to calculate population variance. To illustrate its use, follow these steps: Step 1: Create a Table and Insert Financial […]

Hierarchical Data Retrieval in InnoDB: Implementing Recursive Self-Joins with CTEs

Recursive Self-Joins in InnoDB Recursive self-joins in InnoDB are a powerful technique for retrieving hierarchical data, such as organizational structures, category trees, or threaded discussions. By leveraging Common Table Expressions (CTEs), recursive queries can efficiently […]

The Data Transformation Company

Data Architecture, Engineering and Operations for SQL, NoSQL, NewSQL, Cloud Native Data Platforms, Analytics and AI

Blog