Tôi nghĩ đây không phải là truy vấn tốt nhất mà bạn có thể viết nhưng có vẻ hoạt động
CREATE VIEW commentsCount (date, counter) AS
SELECT
DISTINCT DATE(comment_date) AS date,
IFNULL(COUNT(comment_ID),0) AS total
FROM wp_comments
GROUP BY date ORDER BY total DESC
CREATE VIEW postsCount (date, counter) AS
SELECT
DISTINCT DATE(post_date) AS date,
IFNULL(COUNT(ID),0) AS total
FROM wp_posts
GROUP BY date ORDER BY total DESC
SELECT
postsCount.date,
IFNULL(postsCount.counter,0),
IFNULL(commentsCount.counter,0),
(IFNULL(postsCount.counter,0)*10 + IFNULL(commentsCount.counter, 0))
FROM commentsCount RIGHT JOIN postsCount
ON DATE(postsCount.date) = DATE(commentsCount.date)
GROUP BY postsCount.date
union
SELECT
commentsCount.date,
IFNULL(postsCount.counter,0),
IFNULL(commentsCount.counter,0),
(IFNULL(postsCount.counter,0)*10 + IFNULL(commentsCount.counter, 0))
FROM commentsCount LEFT JOIN postsCount
ON DATE(postsCount.date) = DATE(commentsCount.date)
GROUP BY commentsCount.date