我想從共享相同比賽ID的這組視頻中抽取2個視頻。無論競賽ID是什麼,只要這兩個項目共享相同的價值即可。這可能很容易,但我在我的大腦被炸的那些點之一。我可以聞到燒烤。大聲笑。從多維數組中挑選2個具有相同contestId的項目
Array
(
[0] => Array
(
[id] => 11
[filename] => 7966727971960279-4131736221448300-Adele_Set_Fire_to_the_Rain_Cover_by_Sara_Niemietz_
[added] => 2013-05-06 08:50:34
[userId] => 14
[contestId] => 3
[complete] => 1
)
[1] => Array
(
[id] => 15
[filename] => 7090052934711575-3964279645504194-Adele_Set_Fire_To_The_Rain_cover_by_Sabrina
[added] => 2013-05-06 09:58:08
[userId] => 14
[contestId] => 4
[complete] => 1
)
[2] => Array
(
[id] => 14
[filename] => 6959153088629946-5656902896285110-Adele_Set_Fire_to_the_Rain_Cover_By_Public_School_Kids_Own_With_Guitar
[added] => 2013-05-06 09:42:10
[userId] => 14
[contestId] => 4
[complete] => 1
)
[3] => Array
(
[id] => 10
[filename] => 2795880037180269-1520875971490576-test
[added] => 2013-05-06 08:02:53
[userId] => 9
[contestId] => 3
[complete] => 1
)
[4] => Array
(
[id] => 12
[filename] => 6683752765687164-9656171421456902-Adele_Set_Fire_To_The_Rain_Arlene_Zelina_Cover_
[added] => 2013-05-06 09:21:12
[userId] => 11
[contestId] => 3
[complete] => 1
)
[5] => Array
(
[id] => 13
[filename] => 6917133659214044-8729839283435145-Adele_Set_Fire_To_The_Rain_Boyce_Avenue_cover_on_iTunes_Spotify
[added] => 2013-05-06 09:34:50
[userId] => 12
[contestId] => 3
[complete] => 1
)
)
[你嘗試過什麼?](http://mattgemmell.com/2008/12/08/what-have-you-tried/) – jleft 2013-05-09 20:11:53
試圖與MySQL這樣做,但無法弄清楚如何在查詢開始前不知道比賽ID的情況下,拉出2條匹配contestId的記錄。已經嘗試過基於會話的解決方案循環通過目前活躍的競賽Id,但是卻是笨重和錯誤的方式。 – 2013-05-09 20:17:13
可能有超過2條符合該條件的記錄 - 您希望返回哪個記錄?前兩個,最後兩個,隨機的,還有別的? – jleft 2013-05-09 20:45:14