如何從某個用戶的數據庫表中獲取最新條目

Question

我有一個顯示數據庫中用戶信息的表：

$query = "SELECT reviews2_users.id AS IDUSER,
                            signature,
                            user,
                            email,
                            address,
                            COUNT(reviews2_reviews.id) AS COUNTER
            FROM reviews2_users LEFT JOIN reviews2_reviews ON (reviews2_users.id = reviews2_reviews.id_user)
            GROUP BY reviews2_users.id
            ORDER BY COUNTER DESC";

對於表中的每個用戶，我想顯示他們在數據庫中創建的最新條目的日期。

我試過了，但它不起作用（而且我對數據庫/mysql不太擅長）：

$query = "SELECT reviews2_users.id AS IDUSER,
                            signature,
                            user,
                            email,
                            address,
                            COUNT(reviews2_reviews.id) AS COUNTER
            FROM reviews2_users LEFT JOIN reviews2_reviews ON (reviews2_users.id = reviews2_reviews.id_user)
                            AND LEFT JOIN reviews2_reviews ON max(reviews2_reviews.date)
            GROUP BY reviews2_users.id
            ORDER BY COUNTER DESC";

有人可以幫我解決這個問題嗎？ 謝謝

Answer 1

請將MAX(date)添加到第一個查詢：

$query = "
SELECT reviews2_users.id AS IDUSER
     , signature
     , user
     , email
     , address
     , COUNT(reviews2_reviews.id) AS COUNTER
     , MAX(reviews2_reviews.date) as date
  FROM reviews2_users 
  LEFT 
  JOIN reviews2_reviews 
    ON (reviews2_users.id = reviews2_reviews.id_user)
 GROUP 
    BY reviews2_users.id
 ORDER 
    BY COUNTER DESC
";