MySQL sum(),count()组合用法

    xiaoxiao2021-03-25  58

    SELECT SUM(b.clickCount) FROM (  SELECT COUNT(cac.article_id) as clickCount  from   ( SELECT ca.id as articleId, article_title as articleTitle, csu.user_account as userAccount FROM car_article ca join car_sys_user csu on ca.user_id = csu.id WHERE ca.`status`="1" and ca.user_id = 1  )a JOIN car_article_click cac on a.articleId = cac.article_id GROUP BY cac.article_id )b
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