Retrieving Data from YTD to Last Sunday: A MySQL Solution

Handling Minimum DATETIME Value from JOIN per Account

Using SELECT Statements to Update Table Data: A Comprehensive Guide to Insert and Multiple-Table Updates

Using PostgreSQL to Store Complex Data Structures: XML, Line Breaks, and JSON Alternatives

Excluding Time of Day from Day of Week in MySQL Queries Using WEEKDAY() and BETWEEN Operators

Optimizing MySQL SUM of big TIMEDIFF

Connecting Multiple Tables with Different Foreign Keys: A SQL Challenge

Understanding Database Pooling and Session Management in MySQL: Choosing Between `changeUser` and `USE`

Conditional Aggregation and Dynamic SQL in MySQL: A Guide to Achieving Complex Result Sets

Optimizing MySQL Subqueries: A Deep Dive into Derived Tables and Common Table Expressions (CTEs)