mysql查询指定时间段的每一天

SELECT DATE(log_date) AS day, COUNT(*) AS log_count
FROM logs
WHERE log_date BETWEEN '2023-01-01' AND '2023-01-31'
GROUP BY day
ORDER BY day;

SELECT DATE(log_date) AS day, COUNT(*) AS log_count
FROM logs
WHERE log_date >= '2023-01-01' AND log_date < '2023-02-01'
GROUP BY day
ORDER BY day;

SELECT DATE_ADD('2023-01-01', INTERVAL n DAY) AS day, COALESCE(COUNT(*), 0) AS log_count
FROM (
    SELECT a.N + b.N * 10 + c.N * 100 AS n
    FROM (SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) a
    CROSS JOIN (SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) b
    CROSS JOIN (SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) c
) numbers
WHERE DATE_ADD('2023-01-01', INTERVAL n DAY) BETWEEN '2023-01-01' AND '2023-01-31'
LEFT JOIN logs ON DATE(log_date) = DATE_ADD('2023-01-01', INTERVAL n DAY)
GROUP BY day
ORDER BY day;