[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
编号 INTEGER
姓名
电话号码
主键(id)
编号 INTEGER
来电者号码
接收者号码
年
月
天
期间
主键(id)
我想获取类似的信息
name1(作为呼叫者) | name2(作为接收者) |
---|---|
尼古拉斯 | 玛丽 |
科斯塔斯 | 鲍勃 |
我用 SELECT 名称管理,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
作为呼叫者的名字 | 来电者号码 |
---|---|
尼古拉斯 | 6999999999 |
科斯塔斯 | 688888888 |
或使用 SELECT 名称,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
名称为接收者 | 接收者号码 |
---|---|
玛丽 | 6777777777 |
鲍勃 | 6555555555 |
或与 SELECT 呼叫者,receiver_number FROM phone_calls WHERE year = AND month = AND day = AND duration; 要得到
来电者号码 | 接收者号码 |
---|---|
6999999999 | 6777777777 |
688888888 | 6555555555 |
或使用 SELECT 名称,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
作为呼叫者的名字 | 接收者号码 |
---|---|
尼古拉斯 | 6777777777 |
科斯塔斯 | 6555555555 |
所以我在呼叫者的电话号码或接收者的姓名和电话号码上得到姓名,但在同一个地方没有呼叫者的姓名和接收者的姓名。
您需要 2 个连接才能同时获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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