Seagull

Lesson 5 - 10. Number of unique nodes

Dataset statusAdvanced SQL exercisesvv1

Exercise content

Using customer_nodes, count how many unique nodes there are in the system.

Hints

Hint 1
Do not count all rows in customer_nodes. Count only distinct node_id values.
Hint 2
The key function is COUNT(DISTINCT node_id). Assign the required name: unique_nodes.

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