---
type: learning
area: learning
status: learning
date: 2026-05-03
created: 2026-05-03
updated: 2025-12-27
tags:
  - learning
---
![[img-20251226-001743-b779761c.png]]
Query Evolution Plan
![[img-20251226-003058-85a0af66.png]]
Evolution Order
![[img-20251226-104939-2d9a1dcc.png]]
Note about Switch Function
![[img-20251227-193033-966736aa.png]]
Instead of using if + isblank pattern we can use only coalesce()
![[img-20251227-193358-5bcaa804.png]]