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Решение к #Задача14:

SELECT
count(*) AS count_total,
count(employee_id) AS count_employee,
count(DISTINCT employee_id) AS count_distinct_employee
FROM purchase

#задача



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Решение к #Задача14:

SELECT
count(*) AS count_total,
count(employee_id) AS count_employee,
count(DISTINCT employee_id) AS count_distinct_employee
FROM purchase

#задача

BY SQL задачи


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