没啥说的
SELECT
COUNT(distinct device_id) did_cnt,
count(question_id) question_cnt
FROM
question_practice_detail
WHERE
MONTH(date) = 8;
没啥说的
SELECT
COUNT(distinct device_id) did_cnt,
count(question_id) question_cnt
FROM
question_practice_detail
WHERE
MONTH(date) = 8;