Oracle SQL - 按日期加入多個查詢

Question

我在下面有這個大型查詢，我按日期加入了五個查詢：

--Combined Daily Actions Per Revenue Source-- 
SELECT Two.the_date, 
       sp_dau, 
       cs_dau, 
       tapjoy_ios_dau, 
       tapjoy_android_dau, 
       appcircle_ios_dau, 
       appcircle_android_dau, 
       freecause_dau, 
       portal_dau 
FROM   (SELECT Trunc(Cs.create_dtime) AS The_Date, 
               Count(DISTINCT CASE 
                                WHEN Cs.cs_listing_id LIKE '99999999%' THEN 
                                ( Cs.player_id ) 
                              END)    AS Sp_Dau, 
               Count(DISTINCT CASE 
                                WHEN Cs.cs_listing_id NOT LIKE '99999999%' THEN 
                                ( Cs.player_id ) 
                              END)    AS Cs_Dau 
        FROM   player_chkin_cs Cs 
        WHERE  Trunc(Cs.create_dtime) >= To_date('2012-Jan-01', 'yyyy-mon-dd') 
        GROUP  BY Trunc(Cs.create_dtime)) One 
       INNER JOIN (SELECT Trunc(Tap.create_dtime) AS The_Date, 
                          Count(DISTINCT CASE 
                                           WHEN ( Play.uuid LIKE 'i~%' ) 
                                                 OR ( Play.uuid LIKE 'ti~%' ) 
                                         THEN 
                                           Tap.player_id 
                                         END)     AS Tapjoy_Ios_Dau, 
                          Count(DISTINCT CASE 
                                           WHEN ( Play.uuid LIKE 'a~%' ) 
                                                 OR ( Play.uuid LIKE 'ta~%' ) 
                                         THEN 
                                           Tap.player_id 
                                         END)     AS Tapjoy_Android_DAU 
                   FROM   player_tapjoy Tap 
                          INNER JOIN player Play 
                                  ON Tap.player_id = Play.player_id 
                   WHERE  Trunc(Tap.create_dtime) >= 
                          To_date('2012-Jan-01', 'yyyy-mon-dd') 
                   GROUP  BY Trunc(Tap.create_dtime)) Two 
               ON One.the_date = Two.the_date 
       INNER JOIN (SELECT Trunc(Aux.create_dtime) AS The_Date, 
                          Count(DISTINCT CASE 
                                           WHEN ( Play.uuid LIKE 'i~%' ) 
                                                 OR ( Play.uuid LIKE 'ti~%' ) 
                                         THEN 
                                           Aux.player_id 
                                         END)     AS Appcircle_Ios_Dau, 
                          Count(DISTINCT CASE 
                                           WHEN ( Play.uuid LIKE 'a~%' ) 
                                                 OR ( Play.uuid LIKE 'ta~%' ) 
                                         THEN 
                                           Aux.player_id 
                                         END)     AS AppCircle_Android_DAU 
                   FROM   player_aux_pt Aux 
                          INNER JOIN player Play 
                                  ON Aux.player_id = Play.player_id 
                   WHERE  Aux.site = 'AppCircle' 
                          AND Trunc(Aux.create_dtime) >= 
                              To_date('2012-Jan-01', 'yyyy-mon-dd') 
                   GROUP  BY Trunc(Aux.create_dtime))Three 
               ON Two.the_date = Three.the_date 
       INNER JOIN (SELECT Trunc(Aux.create_dtime)       AS The_Date, 
                          Count(DISTINCT Aux.player_id) AS FreeCause_DAU 
                   FROM   player_aux_pt Aux 
                   WHERE  Aux.site = 'ext : freecause' 
                          AND Trunc(Aux.create_dtime) >= 
                              To_date('2012-Jan-01', 'yyyy-mon-dd') 
                   GROUP  BY Trunc(Aux.create_dtime))Four 
               ON Three.the_date = Four.the_date 
       INNER JOIN (SELECT Trunc(Aux.create_dtime)       AS The_Date, 
                          Count(DISTINCT Aux.player_id) AS Portal_DAU 
                   FROM   player_aux_pt Aux 
                   WHERE  ( Aux.site = 'Portal : Promotion' 
                             OR Aux.site = 'Portal : RadiumOne' 
                             OR Aux.site = 'Portal : Paymentwall' 
                             OR Aux.site = 'Portal : TrialPay' ) 
                          AND Trunc(Aux.create_dtime) >= 
                              To_date('2012-Jan-01', 'yyyy-mon-dd') 
                   GROUP  BY Trunc(Aux.create_dtime)) Five 
               ON Four.the_date = Five.the_date 

大多數子查詢的范圍從2012-Jan-01到現在，除了僅包含從09-Jul-12到現在的數據的子查詢。

因此，當我運行此查詢時，結果中的第一個日期是09-Jul-12而不是01-Jan-12 。

我怎樣才能在Jan 01日開始得到結果，其中除了一個查詢之外的所有查詢都有相關的數據？

Answer 1

您的問題是日期因為不匹配而退出。 您的問題的答案是LEFT OUTER JOIN而不是INNER JOIN 。 這將保留第一個表中的所有行（連接的左側）以及下一個表中的任何匹配信息。 如果沒有匹配，則所有值都變為NULL。

假設第一個表具有您想要的所有日期，則在所有后續查詢中更改連接。

如果你想要0的instaed為NULL，那么在select子句中使用coalesce()來轉換它們。