Resolving MySQL Error: Using Non-Aggregated Columns in GROUP BY Clause

Querying Single Rows in a Table with Multiple Rows in a Subquery Using Row Number and Aggregate Functions

Optimizing Postgres Queries: Simplifying Subqueries and Indexing Strategies for Performance Gains

Retrieving the Last Production Quantity from a MySQL Query: Two Solutions with Correlated Subqueries and row_number()

Finding Top 2 Customers by Maximum Amount of Transaction in Oracle DB: A Comprehensive Guide

Retrieving Latest Date and Total Enrollments from Duplicated School Records

Retrieving Top 1 Row per Group: A Flexible Approach to Data Analysis

Selecting the Maximum Time from a DateTime Column Group by Another DateTime Column Using PostgreSQL's DISTINCT ON Clause