Seagull

Lesson 5 - 13. Unique count and amount by transaction type

Dataset statusAdvanced SQL exercisesvv1

Exercise content

Using customer_transactions, return for each txn_type:

the unique count of customers
the total transacted amount

Hints

Hint 1
Each final row must represent a txn_type. So you need GROUP BY txn_type.
Hint 2
For customers, use COUNT(DISTINCT customer_id). For amounts, use SUM(txn_amount).

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