Part 99: Named Windows with the WINDOW Clause

When multiple window functions share the exact same PARTITION BY and ORDER BY specification, don't repeat yourself—use a named WINDOW clause:

1. Syntax

SELECT 
  first_name,
  salary,
  RANK() OVER w,
  DENSE_RANK() OVER w,
  AVG(salary) OVER w
FROM employees
WINDOW w AS (PARTITION BY department ORDER BY salary DESC);

Key Takeaways

• Keep complex analytical queries clean and DRY using named WINDOW definitions.

In Part 100, we conclude Module 10 with a Month-over-Month Growth & Churn Analysis Project!