Conversion Rate by Acquisition Channel | Dataford Interview Questions

BrightCart wants to measure how effectively each acquisition channel turns signups into paying customers. Write a SQL query to calculate the conversion rate by acquisition channel.

Requirements

Use users as the base table so channels with zero conversions are still included.
A user is considered converted if they have at least one row in subscriptions with status = 'active' or status = 'canceled'.
Return one row per acquisition channel with:
- acquisition_channel
- total_signups
- converted_users
- conversion_rate_pct rounded to 2 decimal places
Order the result by conversion_rate_pct descending, then acquisition_channel ascending.

Schema

users

Column	Type	Description
user_idPK	INT	Unique user identifier
acquisition_channel	VARCHAR(50)	Marketing channel that acquired the user
signup_date	DATE	Date the user signed up
country_code	VARCHAR(2)	User country code

subscriptions

Column	Type	Description
subscription_idPK	INT	Unique subscription record identifier
user_id	INT	User associated with the subscription
start_date	DATE	Subscription start date
status	VARCHAR(20)	Subscription lifecycle status
monthly_amount	NUMERIC(10,2)	Monthly subscription amount

Your question is Conversion Rate by Acquisition Channel. Start with the requirements and the two tables in the Question tab.

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Problem