[Solved] You want to create a dbt model that calculates the average order amount per customer but only for customers with more... Which advanced pattern best helps you write this cleanly and efficiently? | dbt

dbt - Advanced Patterns

You want to create a dbt model that calculates the average order amount per customer but only for customers with more than 5 orders. Which advanced pattern best helps you write this cleanly and efficiently?

ACalculate average without filtering orders count

BWrite a single SELECT with multiple JOINs without CTEs

CUse multiple separate models without referencing each other

DUse nested CTEs: one to count orders per customer, another to filter, then calculate average

Step-by-Step Solution

Solution:

Step 1: Understand the problem requirements
You need to filter customers by order count > 5, then calculate average order amount.
Step 2: Identify the best advanced pattern
Using nested CTEs breaks the problem into steps: count orders, filter customers, then compute average, making code clear and maintainable.
Final Answer:
Use nested CTEs: one to count orders per customer, another to filter, then calculate average -> Option D
Quick Check:
Break complex tasks into steps with CTEs = A [OK]

Quick Trick: Use nested CTEs to split filtering and aggregation [OK]

Common Mistakes:

MISTAKES

Trying to do all in one complex query
Not filtering customers before averaging
Avoiding model references and CTEs

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Which advanced pattern best helps you write this cleanly and efficiently?

Step 1: Understand the problem requirements

Step 2: Identify the best advanced pattern

Final Answer:

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