添加另一個選擇

SELECT COUNT(a.aircraft) as total 
    , a.aircraft 
    , b.fullname AS aircraft_name 
FROM db_pireps AS a 
JOIN db_aircraft AS b ON a.aircraft = b.id 
WHERE pilotid = {$pilotid} 
GROUP BY aircraft 
ORDER BY total DESC 
LIMIT 6

我有這個查詢，但我想增加b.registration AS reg，但我的嘗試似乎失敗了，因爲我不知道如何將另一個SELECT放在該查詢中。添加另一個選擇

來源

2013-02-26 zzwyb89

你正在得到什麼錯誤？ – DevelopmentIsMyPassion 2013-02-26 17:22:12

您可以顯示出現錯誤的查詢嗎？ – Barmar 2013-02-26 17:22:16

使用逗號：

SELECT 
    COUNT(a.aircraft) as total, 
    a.aircraft, 
    b.fullname AS aircraft_name, 
    b.registration AS reg 
FROM db_pireps AS a JOIN db_aircraft AS b 
    ON a.aircraft = b.id WHERE pilotid = {$pilotid} 
GROUP BY aircraft ORDER BY total DESC LIMIT 6

來源

2013-02-26 17:23:00 Sammitch

你每天都會學到新東西，謝謝。我從來不知道你可以用逗號。 – zzwyb89 2013-02-26 17:25:20

@ zzwyb89：真的嗎？你沒看過其餘的查詢嗎？你沒有寫這個查詢開始？ – 2013-02-26 17:25:47

SELECT COUNT(a.aircraft) as total, a.aircraft, b.fullname AS aircraft_name, b.registration AS reg 
FROM db_pireps AS a JOIN db_aircraft AS b ON a.aircraft = b.id 
WHERE a.pilotid = {$pilotid} 
GROUP BY a.aircraft 
ORDER BY total DESC LIMIT 6

提示：爲了避免問題的列命名，如果使用別名表名，使用別名您正在使用查詢中的所有列。

來源

2013-02-26 17:23:44 araknoid

我真的不明白你的問題，但我認爲這應該工作：

$aircraft_query = "SELECT COUNT(a.aircraft) as total, a.aircraft, b.fullname AS aircraft_name, b.registration AS reg 
        FROM db_pireps AS a JOIN db_aircraft AS b ON a.aircraft = b.id 
        WHERE pilotid = {$pilotid} 
        GROUP BY aircraft 
        ORDER BY total DESC LIMIT 6";

來源

2013-02-26 17:24:06 c4pone

你只需要添加列b.registration並給它別名爲REG。見下文。它與你所做的相同

SELECT COUNT(a.aircraft) as total, a.aircraft, b.fullname AS aircraft_name, b.registration AS reg 
FROM db_pireps AS a JOIN db_aircraft AS b ON a.aircraft = b.id 
WHERE pilotid = {$pilotid} 
GROUP BY a.aircraft 
ORDER BY total DESC LIMIT 6

來源

2013-02-26 17:26:12 DevelopmentIsMyPassion

添加另一個選擇

回答

相關問題