我喜歡爲我的網站製作一個論壇傳情。它很容易顯示最新的帖子或線程。我喜歡在最後一次活動中排序的同一個查詢中獲取最新主題和帖子。所以它將通過REPLY TO POST日期和THREAD POST日期在相同的查詢中進行排序。我認爲它與你如何分組有關,但我不確定。PHP MYSQL論壇傳情,howto?
表
線程
id, header, text, date, author
訊息的使用
id, text, date, author, thread_id
例
19分鐘前 - 如何使PHP/MySQL的腳本(2)
34分鐘前 - 請幫我在這裏(0)
1小時前 - 我需要用PHP幫助(1)
如您所見,回答的線程和新線程都在列表中。 (我需要最新回覆的日期或創建時間,標題和回覆數())
我希望你能得到,並知道如何去做。
特勒爾斯
UPDATE:
我都這樣了,它的好,但我只用回信獲得線程。
SELECT
threads.*,
posts.*,
(SELECT date FROM posts WHERE thread_id = threads.id ORDER BY date DESC LIMIT 0,1) AS postdate,
(SELECT count(id) FROM threads WHERE thread_id = thread.id) AS replys
FROM
threads,
posts
WHERE
threads.id = posts.thread_id
GROUP BY
thread_id
ORDER BY
postdate DESC,
thread.date
LIMIT
0,15
我該怎麼辦?
UPDATE
aaaaaaaaaaaaaaaaawwwww呀!!!!
我設法做我自己:-)花了一段時間纔得到它的權利。
SELECT
fisk_debat.id,
fisk_debat.dato,
IF((SELECT count(id) FROM fisk_debat_svar WHERE debatid = fisk_debat.id) < 1, fisk_debat.dato, (SELECT dato FROM fisk_debat_svar WHERE debatid = fisk_debat.id ORDER BY dato DESC LIMIT 0,1)) AS svardato,
fisk_debat.overskrift,
(
SELECT count(fisk_debat_svar.debatid)
FROM fisk_debat_svar
WHERE fisk_debat_svar.debatid = fisk_debat.id
) AS svar
FROM fisk_debat
GROUP BY id
UNION
SELECT
fisk_debat_svar.debatid AS id,
max(fisk_debat_svar.dato) AS dato,
max(fisk_debat_svar.dato) AS svardato,
(
SELECT fisk_debat.overskrift
FROM fisk_debat
WHERE fisk_debat.id = fisk_debat_svar.debatid
) AS overskrift,
(
SELECT count(fisk_debat_svar.debatid)
FROM fisk_debat_svar
WHERE fisk_debat_svar.debatid = id
) AS svar
FROM fisk_debat_svar
WHERE id != id
GROUP BY id
ORDER BY svardato DESC, dato DESC
LIMIT 0,15
已開發了論壇軟件自己?數據庫結構看起來有缺陷,線程中的「原始帖子」也應該放在** posts **表中。這也會讓你的查詢更容易。 – Stijn 2011-05-16 11:50:58
嘿。是的,我自己開發了它。原來的帖子應該在那裏。 – Holsteinkaa 2011-05-16 11:52:46
如果不檢查您的整個查詢,您在第4行有一個錯字。 **(SELECT dato **應該是**(選擇日期** – Stijn 2011-05-16 12:06:40