加入表與自己和SQL

選擇行我有一個名爲表「來電」，欄目有：加入表與自己和SQL

a_imei_number (imei of caller) 
b_imei_number (imei of number which is called) 
a_phone_number (number of caller) 
b_phone_number (number of number which is called) 
call_start_time (as hour) 
call_end_time (as hour) 
call_day (as day)

我試圖找到whic已經在相交的時候有克隆的IMEI號，以便調用必須至少有2行，所以phone_numbers必須不同，並且imei_numbers相同。像

id a_imei b_imei a_phone b_phone call_start_time call_end_time call_day 
1 A  b  123  321  13:30   13:50   01.02.2014 
2 A  c  999  888  13:41   13:55   01.02.2014

我該如何加入自己的表？

注意：一行的a_imei可能與其他行的b_imei相同，因爲可能有一個克隆的手機正在呼叫並且該手機的克隆被某人調用。

來源

2014-03-03 abidinberkay

加入斜面你只是這樣做......'調用a，調用b WHERE a.column = b.column'？ – TheOneWhoPrograms

不，我不能說這就是爲什麼我問這個問題 – abidinberkay

你能向我們展示一些來自表格的樣本數據，以及你希望選擇從樣本數據中選擇什麼以及不選擇什麼？乍一看，我不知道爲什麼你不能按照我上面的建議去做。 – TheOneWhoPrograms

以下是如何讓所有的a_imei克隆：

SELECT c1.* 
FROM calls As c1 
JOIN calls As c2 
    ON c1.a_imei   = c2.a_imei 
    AND c1.a_phone   != c2.a_phone 
    AND c1.call_start_time < c2.call_end_time 
    AND c1.call_end_time > c2.call_start_time 
ORDER BY c1.a_imei, c1.call_start_time, c1.call_end_time

下面是如何比較這兩個「一」 S和「b」 S在一起：

SELECT c1.*, c2.* 
FROM calls As c1 
JOIN calls As c2 
    ON c1.call_start_time < c2.call_end_time 
    AND c1.call_end_time > c2.call_start_time 
    AND ( (c1.a_imei  = c2.a_imei AND c1.a_phone != c2.a_phone) 
     OR (c1.a_imei  = c2.b_imei AND c1.a_phone != c2.b_phone) 
     OR (c1.b_imei  = c2.a_imei AND c1.b_phone != c2.a_phone) 
     OR (c1.b_imei  = c2.b_imei AND c1.b_phone != c2.b_phone) 
     ) 
ORDER BY c1.a_imei, c1.call_start_time, c1.call_end_time, c1.b_imei

來源

2014-03-03 15:05:11 RBarryYoung

a和b必須在同一個查詢中，因爲a_imei和b_imei也可以相交，例如你和我使用相同的imei（克隆非法）你叫別人，所以你的imei在a_imei和相同有人在b_imei專欄中給我打電話和我的imei--我們將使用其電話號碼相同且同時具有不同電話號碼的電話。 – abidinberkay

我會提出一個小建議，即第一個電話小於第二個電話，所以它不會做相反的操作，並返回phoneA + phoneB對和phoneB + phoneA對的相同行集合... – DRapp

加入表與自己和SQL

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