Using MySQL Row Numbers and Window Functions to Get N Previous and Next Items in a Result Set Given an ID and an ORDER BY Clause.

Understanding Aggregate Functions and GROUP BY Clauses: How to Get the Second Highest Salary in a Database Table

Unpivot Two Columns and Group by Cohorts for Better Data Analysis

How to Use Multiple Variables in a WRDS CRSP Query Using Python and SQL

Overcoming SQL Count Limitations with Aggregation and Subqueries

Understanding MySQL Stored Procedures and the Mysterious Case of the Unrestricted WHERE Clause: Best Practices for Avoiding Unexpected Behavior in Stored Procedures

Understanding Variable Control in SQL WHERE Statements: A Guide to Boolean Logic

Transforming XML Data into Relational Datasets in SQL Server

How to Use Window Functions in SQL for Equal Representation of Rows in a Single Column

Importing Data Only: A Comprehensive Guide to MySQL Export and Import