顯示給定變量的最近一行

Question

下面的代碼從MySQL表中查詢時使用名爲「time」的「timestamp」類型字段。

$contest = "SELECT SUM(points) AS total, COUNT(points) AS total2, loginid, comment 
       FROM contest 
       WHERE loginid = '$idn'"; 

編輯：我要總結點對所有行。但是，我想顯示最近時間戳的評論。我如何在1個查詢中做到這一點？

Answer 1

SELECT points, comment, timestamp 
FROM contest 
WHERE loginid = '$idn' 
ORDER BY timestamp DESC 
LIMIT 1 

Answer 2

根據您的後期編輯：

$contest = "SELECT SUM(points) AS total, COUNT(points) AS total2 
      FROM contest 
      WHERE loginid = '$idn' 
      GROUP BY time DESC 
      LIMIT 1";