Optimizing Complex SQL Queries: A Deep Dive into Window Functions and Pattern Matching

SQL Window Functions for Aggregate Calculations with the COALESCE and MAX Approach

Solving Duplicates in Time Periods from Repeated Groups Using SQL Analytics

Handling Missing Primary Keys for Derived Columns: The LAG/LEAD Puzzle in SQL Server 2012

Removing Consecutive Duplicates in Oracle SQL Using LAG() with a Condition

Fixing Discontinuous Date Ranges with Oracle SQL: A Step-by-Step Guide

Identifying Potential Entry and Exit Rows in SQL Server Using CTEs