如何通過內部聯接表排序

我有4個表。這裏是我的代碼如何通過內部聯接表排序

SELECT * FROM reservation AS t1 INNER JOIN guest AS t2 
ON t1.guest_id = t2.guest_id 
INNER JOIN room AS t3 
ON t1.room_id = t3.room_id 
INNER JOIN room_type AS t4 
ON t3.room_type_id = t4.room_type_id

我如何使用desc命令？非常感謝:)

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2017-10-05 dadadaxtr

呃地存在被存在......只是做'ORDER BY'問題是什麼？你有沒有嘗試過？ –

是的，它不工作:( – dadadaxtr

@dadadaxtr你可以粘貼你正在得到的錯誤？ –

SELECT * FROM reservation AS t1 INNER JOIN guest AS t2 
ON t1.guest_id = t2.guest_id 
INNER JOIN room AS t3 
ON t1.room_id = t3.room_id 
INNER JOIN room_type AS t4 
ON t3.room_type_id = t4.room_type_id 
order by t1.guest_id desc

來源

2017-10-05 14:10:49

相同，我做了先生..但我想排序的列是t1.reservation_datetime – dadadaxtr

好吧，那裏，沒有行爲您的選擇請求 –

是否有可能，我的表排序影響排序在我的查詢？ – dadadaxtr

SELECT * FROM reservation AS t1 INNER JOIN guest AS t2 
ON t1.guest_id = t2.guest_id 
INNER JOIN room AS t3 
ON t1.room_id = t3.room_id 
INNER JOIN room_type AS t4 
ON t3.room_type_id = t4.room_type_id 
ORDER BY t1.reservation_datetime DESC

這將是你問什麼，但哪裏此列從何而來？

來源

2017-10-05 14:19:02

從保留..我使用已..我客人我的表排序影響我的查詢。 – dadadaxtr

@dadadaxtr張貼您的表結構，然後我們可以幫助更多 –

我編輯al ready ..請點擊圖片鏈接 – dadadaxtr

根據你的意見，你只需要添加ORDER BY DESC [COLUMN]。

這應該解決您的問題。

SELECT * FROM reservation AS t1 
INNER JOIN guest AS t2 
ON t1.guest_id = t2.guest_id 
INNER JOIN room AS t3 
ON t1.room_id = t3.room_id 
INNER JOIN room_type AS t4 
ON t3.room_type_id = t4.room_type_id 
ORDER BY t1.reservation_datetime DESC

我建議你命名你的變量更記憶術的方式，我會更易於分析，說SELECT * FROM reservation AS r

來源

2017-10-05 14:24:09

感謝所有的幫助..問題是我的表自動排序..我已經禁用它，我的查詢工程;）非常感謝！ – dadadaxtr

@dadadaxtr沒問題，應該確保你發佈了你的問題的所有細節，以便人們可以準確地回答。請務必將答案標記爲已解決，因爲除了您還有其他問題，答案是正確的。 –

SELECT * FROM reservation AS t1 
INNER JOIN guest AS t2 ON t1.guest_id = t2.guest_id 
INNER JOIN room AS t3 ON t1.room_id = t3.room_id 
INNER JOIN room_type AS t4 ON t3.room_type_id = t4.room_type_id 
ORDER BY t1.reservation_datetime DESC

但要確保

必須有預訂表中的列名reservation_datetime
guest_id列應存在於預訂表和訪客表中
ROOM_ID列必須在房間桌子和預約表
room_type_id列必須在室的桌子和room_type表

來源

2017-10-05 14:27:45 Tousif

它都存在..根據你的陳述。也許可能表是問題..它自動排序。 – dadadaxtr

嘗試通過除ttime.reservation_id以外的日期時間列應用順序。 – Tousif

感謝所有的幫助..問題是我的表自動排序..我已經禁用它，我的查詢工作;）非常感謝！ – dadadaxtr

如何通過內部聯接表排序

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