Множественное левое внешнее соединение, возвращающее NULL - PullRequest
Новая
       34

Множественное левое внешнее соединение, возвращающее NULL

0 голосов
/ 14 апреля 2020

В приведенном ниже примере мой запрос возвращает все столбцы NULL, что не является результатом, который я предполагал получить. Основываясь на предложении Where, условие 2019 должно было возвращать значения, а 2018 должно возвращать NULL

. Если одно OUTER JOIN завершилось неудачно, все другие объединения тоже не работают или я смотрю на это совершенно неправильно. 

SELECT 
    SUM(MillForecastTons_NovDec_View.[11]) AS Nov,
    SUM(MillForecastTons_NovDec_View.[12]) AS Dec,
    SUM(MillForecastTons_View.[1]) AS Jan,
    SUM(MillForecastTons_View.[2]) AS Feb,
    SUM(MillForecastTons_View.[3]) AS Mar,
    SUM(MillForecastTons_View.[4]) AS Apr,
    SUM(MillForecastTons_View.[5]) AS May,
    SUM(MillForecastTons_View.[6]) AS Jun,
    SUM(MillForecastTons_View.[7]) AS Jul,
    SUM(MillForecastTons_View.[8]) AS Aug,
    SUM(MillForecastTons_View.[9]) AS Sep,
    SUM(MillForecastTons_View.[10]) AS Oct,

    SUM(MillForecastActTons_NovDec_View.[11]) AS NovAct,
    SUM(MillForecastActTons_NovDec_View.[12]) AS DecAct,
    SUM(MillForecastActTons_View.[1]) AS JanAct,
    SUM(MillForecastActTons_View.[2]) AS FebAct,
    SUM(MillForecastActTons_View.[3]) AS MarAct,
    SUM(MillForecastActTons_View.[4]) AS AprAct,
    SUM(MillForecastActTons_View.[5]) AS MayAct,
    SUM(MillForecastActTons_View.[6]) AS JunAct,
    SUM(MillForecastActTons_View.[7]) AS JulAct,
    SUM(MillForecastActTons_View.[8]) AS AugAct,
    SUM(MillForecastActTons_View.[9]) AS SepAct,
    SUM(MillForecastActTons_View.[10]) AS OctAct,

    SUM(MillForecastBudTons_NovDec_View.[11]) AS NovBud,
    SUM(MillForecastBudTons_NovDec_View.[12]) AS DecBud,
    SUM(MillForecastBudTons_View.[1]) AS JanBud,
    SUM(MillForecastBudTons_View.[2]) AS FebBud,
    SUM(MillForecastBudTons_View.[3]) AS MarBud,
    SUM(MillForecastBudTons_View.[4]) AS AprBud,
    SUM(MillForecastBudTons_View.[5]) AS MayBud,
    SUM(MillForecastBudTons_View.[6]) AS JunBud,
    SUM(MillForecastBudTons_View.[7]) AS JulBud,
    SUM(MillForecastBudTons_View.[8]) AS AugBud,
    SUM(MillForecastBudTons_View.[9]) AS SepBud,
    SUM(MillForecastBudTons_View.[10]) AS OctBud

     FROM MillForecast_View MillForecast_View

     LEFT OUTER JOIN MillForecastBudTons_NovDec_View MillForecastBudTons_NovDec_View
         ON  MillForecast_View.MillForecastId = MillForecastBudTons_NovDec_View.MillForecastID  

     LEFT OUTER JOIN MillForecastTons_NovDec_View MillForecastTons_NovDec_View
         ON  MillForecast_View.MillForecastId = MillForecastTons_NovDec_View.MillForecastID 

     LEFT OUTER JOIN MillForecastActTons_NovDec_View MillForecastActTons_NovDec_View
         ON  MillForecast_View.MillForecastId = MillForecastActTons_NovDec_View.MillForecastID  

     LEFT OUTER JOIN MillForecastTons_View MillForecastTons_View
         ON  MillForecast_View.MillForecastId = MillForecastTons_View.MillForecastID

     LEFT OUTER JOIN MillForecastActTons_View MillForecastActTons_View
         ON  MillForecast_View.MillForecastId = MillForecastActTons_View.MillForecastID

     LEFT OUTER JOIN MillForecastBudTons_View MillForecastBudTons_View
         ON  MillForecast_View.MillForecastId = MillForecastBudTons_View.MillForecastID
WHERE MillForecastTons_View.Year = 2019 AND MillForecastActTons_View.Year = 2019 AND MillForecastBudTons_View.Year = 2019 AND MillForecastTons_NovDec_View.Year = 2019
AND MillForecastActTons_NovDec_View.Year = 2018 AND MillForecastBudTons_NovDec_View.Year = 2018
...