Adding Conditional Logic Inside MySQL's CASE Clause: A Comprehensive Guide to Nesting Cases and Using Built-In Functions

Extracting Day of Week from Timestamp Data Using SQL Functions

Conditional Aggregation for SQL Queries with Multiple Conditions

Query Optimization for MySQL: Using `MAX()` to Retrieve Distinct User Handles with IDs

Understanding Duplicate Rows in SQL: A Deep Dive

Mastering Transactions in MariaDB: Best Practices for Data Consistency and Integrity

Understanding the Problem: Joining Four Tables with a Complex WHERE Clause

Breaking Down a Single Column into Multiple Columns in MySQL Using String Functions and REGEXP

Understanding Foreign Keys in MySQL and Resolving SQL Syntax Errors: A Guide to Improving Data Integrity and Performance

SQL Group By Return Null If One Is Null: Solving the Puzzle of Partially Deleted Orders