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[英]How to make two $db->query from the same table with two different ORDER by column that each other stand independenty in one php page?
[英]How can i make a query of two different objects in the same column of one table, relationed to different columns in another table?
我有桌子
編號 INTEGER
姓名
電話號碼
主鍵(id)
編號 INTEGER
來電者號碼
接收者號碼
年
月
天
期間
主鍵(id)
我想獲取類似的信息
name1(作為呼叫者) | name2(作為接收者) |
---|---|
尼古拉斯 | 瑪麗 |
科斯塔斯 | 鮑勃 |
我用 SELECT 名稱管理,caller_number FROM people JOIN phone_calls ON people.phone_number = phone_calls.caller_number WHERE year = AND month = AND day = AND duration =; 要得到
作為呼叫者的名字 | 來電者號碼 |
---|---|
尼古拉斯 | 6999999999 |
科斯塔斯 | 688888888 |
或使用 SELECT 名稱,receiver_number FROM people JOIN phone_calls ON people.phone_number = phone_calls.receiver_number WHERE year = AND month = AND day = AND duration =; 要得到
名稱為接收者 | 接收者號碼 |
---|---|
瑪麗 | 6777777777 |
鮑勃 | 6555555555 |
或與 SELECT 呼叫者,receiver_number FROM phone_calls WHERE year = AND month = AND day = AND duration; 要得到
來電者號碼 | 接收者號碼 |
---|---|
6999999999 | 6777777777 |
688888888 | 6555555555 |
或使用 SELECT 名稱,receiver_number FROM people JOIN phone_calls ON people.phone_number = phone_calls.caller_number WHERE year = AND month = AND day = AND duration =; 要得到
作為呼叫者的名字 | 接收者號碼 |
---|---|
尼古拉斯 | 6777777777 |
科斯塔斯 | 6555555555 |
所以我在呼叫者的電話號碼或接收者的姓名和電話號碼上得到姓名,但在同一個地方沒有呼叫者的姓名和接收者的姓名。
您需要 2 個連接才能同時獲取呼叫者和接收者的姓名。 例如
SELECT caller.name, receiver.name
FROM phone_calls
JOIN people caller ON caller.phone_number = phone_calls.caller_number
JOIN people receiver ON receiver.phone_number = phone_calls.receiver_number
WHERE <your conditions>
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