How to Query Databases by Day of the Week: Advanced Techniques and Best Practices

Creating a Random Subset of a Table with an Average Number of Counts per Key: A Practical Guide to Sampling Large Datasets

Understanding User Activity Grouping in Databases: A Comprehensive Guide

Optimizing Triggers in MySQL: Best Practices for Variable Usage and Error Prevention

How to Update Column Values Based on Substring Comparisons in SQL Databases

Concatenating Non-Empty GROUP_CONCAT Values to Parent Columns in MySQL: A Comprehensive Solution

Understanding SQL Select with Least and Greatest Functions: Efficient Duplicate Row Identification

Sorting and Filtering JSON Array Elements Using MySQL

Converting SQL Queries to Laravel Query Builder: A Step-by-Step Guide

Understanding the Mysterious Case of an Empty Table with a SELECT Statement