मुझे लगता है कि यह सबसे अच्छी क्वेरी नहीं है जिसे आप लिख सकते हैं, लेकिन यह काम करती प्रतीत होती है
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