Finding Unique Conversations in a SQL Table: A Step-by-Step Approach Using LEAST() and GREATEST() Functions

Calculating Employee Achievements: Final Mark Query

There is no specific problem or question that requires a numerical answer. The provided text appears to be a list of 46 SQL-related topics, with each topic represented by a numbered point. There is no clear connection between these points and a single numerical answer.

Joining Two SQL Tables with Multiple Values in a Single Column Using Junction Tables

Showing All Dates if There Is No Data in a SQL Query for a Given Date Range

Migrating MySQL Field from VARCHAR to DATETIME: A Step-by-Step Guide

Selecting Only the Last Date Row of a Joined Table: A Comparative Analysis of SQL Techniques

Understanding the Limitations of MySQL's Average Function When Used with SELECT * Statements

Avoiding Duplicate Clauses in MySQL Queries: A Comprehensive Guide

Preventing Duplicate Index Creations in MySQL and PHP: A Guide to Concurrency Management and Lock Variables