window-functions-deep-dive

Features and purpose

Master OPAL window functions for row-relative calculations, rankings, and moving aggregates. Covers lag(), lead(), row_number(), rank(), dense_rank(), moving averages, first(), and last(). Use when comparing rows to neighbors, ranking within partitions, calculating rate of change, or computing time-based moving windows. CRITICAL - OPAL uses window() function wrapper, NOT SQL OVER clause.

Quick start

Follow the repository instructions for this skill and your agent. Review the files and dependencies before adding it to your workflow.