小编kyl*_*lex的帖子

该表Arc(x,y)目前有以下元组(注意有重复):

(1,2),
(1,2),
(2,3),
(3,4),
(3,4),
(4,1),
(4,1),
(4,1),
(4,2)

计算查询结果:

SELECT a1.x, a2.y, COUNT(*)
FROM Arc a1, Arc a2
WHERE a1.y = a2.x
GROUP BY a1.x, a2.y;

是什么a1和a2指的是什么？

我有以下HTML结构:

<span class="spam">
     <button class="spam_button" value="2">Spam</button>
</span>

我想要在父级中显示响应,但我无法理解.

$('.spam_button').live('click', function() {
    var spam_id =$(this).val();
    $.ajax({
        type: "POST",
        url: "spam.php",
        data: "spam_id="+spam_id,
        success: function(html){
            $(this).parent().html(html);                
        }
    });
});

这是我的jQuery

$('.vote_down').live('click', function() {
    var $votes = $(this);
    var c_id = $(this).closest('.c_id').val();
    var c_vote = $(this).closest('.c_vote').val();
    $.ajax({
        type: "POST",
        url: "votes.php",
        data: "c_id="+c_id+"&c_vote="+c_vote,
        success: function(html){
            $votes.parent().html(html);             
        }
    });
});

以下是它的html:

vars c_id,c_vote目前一无所获

<div class="votes">
    <input type="hidden" class="c_id" value="5" />
    <input type="hidden" class="c_vote" value="2" />
    <img src="down_vote.png" border="0" class="vote_down" alt="Down Vote" />
</div>

这可以在 FF 上提交，但不能在 Chrome 上提交。有什么建议么？

<form action="/test" method="post" onchange="this.submit();">
   <select>
      <option value="f">f</option>
      <option value="g">g</option>
   </select>
</form>

我已尝试过多种方法来使用全文查询进行过滤,但无济于事.这是我尝试过的:

{
    "_source": "_id",
    "query": {
        "filtered": {
            "multi_match": {
                "query": "test search query",
                "fields": ["title"]
            },
            "filter": {
                "term": {"user_id": "1"}
            }
        }
    }
}

我有以下数组,无法弄清楚如何获取数据:

Array ( 
   [0] => stdClass Object ( 
      [address_components] => Array ( 
         [0] => stdClass Object ( 
            [long_name] => 180 
            [short_name] => 180 
            [types] => Array ( [0] => street_number ) 
         ) 
         [1] => stdClass Object ( 
            [long_name] => Campus Dr 
            [short_name] => Campus Dr 
            [types] => Array ( [0] => route ) 
         ) 
         [2] => stdClass Object ( 
            [long_name] => Arcadia 
            [short_name] => Arcadia 
            [types] => Array ( 
               [0] => locality 
               [1] => political 
            ) 
         ) 
         [3] => stdClass …