Understanding the Locking Mechanism of MySQL's SELECT FOR UPDATE Statement: A Study on Row-Level and Table-Level Locks.

Using Window Functions to Count with HAVING Sum Restrictions in a JOIN without Sub-Queries

Understanding Aggregate Functions in SQL: A Guide to Summarizing and Analyzing Data with SQL Aggregate Functions

Calculate Balance by Date and Total Input/Output for Each Item in SQL Databases

Pivot Table by Datediff: A SQL Performance Optimization Guide

Calculating Percentage of Occurrences in a SQL Query: A Step-by-Step Guide

Combining GROUP BY and CASE expressions for Accurate Group Labelling in SQL

Optimizing Table Updates: Using INSERT ... SELECT with ON DUPLICATE KEY UPDATE

Optimizing MySQL Query Performance with LIKE Conditions

Using Custom Object and Variable from Properties File in Hibernate Querying