Running Totals from Consecutive Columns: A Flexible Approach to Gaps and Islands

Filling Missing Dates in PostgreSQL with Zero Using generate_series Function

SQL Ranking Based on Condition

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

SQL Query to Calculate Sum of Values for Each User and Date, Treating Consecutive Days as a Single Day

Merging Overlapping Date Ranges in SQL Server 2014

Finding Missing Numbers in a Sequence: A Recursive Approach