獲取在PHP

Question

我試圖從一個表，其記錄用戶

這裏被輸入得到最後的7條從MySQL過去的7行是我的查詢：

$database->setQuery("SELECT * FROM #__mytable WHERE (user_id = '$uid')"); 
$dberr=""; 
if (!$database->query()) { 
    $dberr = $database->getErrorMsg(); 
} 

if(!$dberr==""){ 
    echo($dberr."<br>"); 
}else{ 
    $rows = $database->loadObjectList(); 

怎麼辦我循環通過$行獲得最後7個？

Answer 1

SELECT * 
FROM #__mytable 
WHERE user_id = '$uid' 
ORDER BY 
     entered_date DESC 
LIMIT 7 

爲了讓他們按升序排列，使用：

SELECT * 
FROM (
     SELECT * 
     FROM #__mytable 
     WHERE user_id = '$uid' 
     ORDER BY 
       entered_date DESC 
     LIMIT 7 
     ) q 
ORDER BY 
     entered_date 

Answer 2

SELECT * FROM #__mytable WHERE (user_id = '$uid') ORDER BY id DESC LIMIT 0,7 

Answer 3

你別：

SELECT * FROM ... WHERE ... ORDER BY user_id DESC LIMIT 7