排序MySQL查询

Question

我有两个MySQL查询：

$sql = "SELECT * FROM content WHERE threadName LIKE '%$filter%' ORDER BY lastUpdated desc"; 

和

$sql = "SELECT * FROM content ORDER BY lastUpdated desc"; 

最终的结果是让所有的行从一个特定的表“内容”返回，但有那些匹配顶部的变量$ filter。有没有可能结合这两个单个查询或我应该使用JOIN？

............仍然没有运气。这是我目前有：

$sql = "SELECT * FROM content WHERE threadName LIKE '%$filter%' ORDER BY lastUpdated desc UNION SELECT * FROM content WHERE threadName NOT LIKE '%$filter%' ORDER BY lastUpdated desc"; 

这给：

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/andrew/public_html/PHP/threadDisplay.php on line 20 

虽然单独使用时，第一部分（前盟）的作品。

Answer 1

如何使用CASE STATEMENT。

喜欢的东西

SELECT * 
FROM content 
ORDER BY CASE 
      WHEN threadName LIKE '%$filter%' THEN 0 
      ELSE 1 
     END ASC, 
     lastUpdated desc 

Answer 2

(SELECT * 
FROM content 
WHERE threadName LIKE '%$filter%') 
UNION 
(SELECT * 
FROM content 
WHERE threadName NOT LIKE '%$filter%') 
ORDER BY lastUpdated desc 

编辑：MySQL需要一些包围，并要求工会后做的顺序，对不起忘了这一点。