Combining Records in SQL: Removing Duplicates and Performing Aggregations

Understanding the Order of CAST() and COALESCE() in MariaDB: A Guide to Avoiding Unexpected Results When Working with JSON Data

Calculating Sum Values in Columns for Each Row in SQL

5 Essential SQL Query Optimization Techniques for Efficient Data Table Updates

Extracting Year from Date and Converting to Number in Oracle: Best Practices and Optimized Queries

Using Django ORM to Count and Group Data: Mastering Aggregate Functions for Efficient Data Analysis

Trimming Strings After First Occurrence of Character

How to Retrieve Rows Where the Values of Two Columns Are Different in MySQL

Inserting Data into Multiple Tables from a Single Row: SQL Transactions and Stored Procedures

Finding the Earliest Date for Each ID: A SQL Solution Using Window Functions