將兩個SQL查詢合併爲一個

Question

我有下面的查詢，我試圖總結一下，我得到兩行，每個查詢的每一個總和，有無論如何添加兩個總和，所以一行總數是兩個查詢的返回值？謝謝你在前進

SELECT count(*) 

    FROM 
     eUser eUser2 RIGHT OUTER JOIN prcIncidentManagement ON (eUser2.eUserName=prcIncidentManagement.AssignedTo) 
     INNER JOIN eFolder ON (prcIncidentManagement.EFOLDERID=eFolder.eFolderID) 
    WHERE 
    eFolder.eCreationTime between '01/01/2015' and '13/10/2015' 
    union 
    SELECT count(*) 
    FROM 
     eUser RIGHT OUTER JOIN prcRequestFulfilment ON (prcRequestFulfilment.AssignedTo=eUser.eUserName) 
     INNER JOIN eFolder ON (eFolder.eFolderID=prcRequestFulfilment.EFOLDERID) 
    WHERE 
    eFolder.eCreationTime between '01/01/2015' and '13/10/2015' 

Answer 1

這應該工作 -

SELECT SUM(Cnt) FROM 
    (SELECT count(*) AS Cnt 

     FROM 
      eUser eUser2 RIGHT OUTER JOIN prcIncidentManagement ON (eUser2.eUserName=prcIncidentManagement.AssignedTo) 
      INNER JOIN eFolder ON (prcIncidentManagement.EFOLDERID=eFolder.eFolderID) 
     WHERE 
     eFolder.eCreationTime between '01/01/2015' and '13/10/2015' 
     union 
     SELECT count(*) 
     FROM 
      eUser RIGHT OUTER JOIN prcRequestFulfilment ON (prcRequestFulfilment.AssignedTo=eUser.eUserName) 
      INNER JOIN eFolder ON (eFolder.eFolderID=prcRequestFulfilment.EFOLDERID) 
     WHERE 
     eFolder.eCreationTime between '01/01/2015' and '13/10/2015') A 

Answer 2

嘗試：

select sum(cnt) total_cnt 
from (
    SELECT count(*) cnt 
    FROM eUser eUser2 
    RIGHT OUTER JOIN prcIncidentManagement ON eUser2.eUserName = prcIncidentManagement.AssignedTo 
    INNER JOIN eFolder ON prcIncidentManagement.EFOLDERID = eFolder.eFolderID 
    WHERE eFolder.eCreationTime between '01/01/2015' and '10/13/2015' 

    union all 

    SELECT count(*) 
    FROM eUser 
    RIGHT OUTER JOIN prcRequestFulfilment ON prcRequestFulfilment.AssignedTo = eUser.eUserName 
    INNER JOIN eFolder ON eFolder.eFolderID = prcRequestFulfilment.EFOLDERID 
    WHERE eFolder.eCreationTime between '01/01/2015' and '10/13/2015' 
) x 

可以使用union all而不是union。
如果您使用union而第一個和第二個查詢返回的count相同，那麼union將刪除一個計數，因爲它只允許不同的值。
所以，你不會得到你期待的結果。

日期必須爲mm/dd/yyyy，否則使用convert從字符串中獲取數據。

Answer 3

這應該爲你做，除非我建議你使用UNION ALL而不是UNION。

如果同時你的查詢返回相同的值，那麼UNION操作將使兩個值之間的隱含DISTINCT你SUM將只是那些值中的一個，而不是增加了一倍。

SELECT SUM(cnt_val) Sum_Values 
FROM (
    SELECT count(*) cnt_val 
    FROM eUser eUser2 
    RIGHT JOIN prcIncidentManagement 
     ON (eUser2.eUserName = prcIncidentManagement.AssignedTo) 
    INNER JOIN eFolder 
     ON (prcIncidentManagement.EFOLDERID = eFolder.eFolderID) 
    WHERE eFolder.eCreationTime BETWEEN '01/01/2015' 
      AND '13/10/2015' 

    UNION ALL 

    SELECT count(*) cnt_val 
    FROM eUser 
    RIGHT JOIN prcRequestFulfilment 
     ON (prcRequestFulfilment.AssignedTo = eUser.eUserName) 
    INNER JOIN eFolder 
     ON (eFolder.eFolderID = prcRequestFulfilment.EFOLDERID) 
    WHERE eFolder.eCreationTime BETWEEN '01/01/2015' 
      AND '13/10/2015' 
    ) Result_Set 

因此，假設兩個查詢的結果是：

2 --> first query result 
2 --> second query result 

然後總和爲2，如果你使用UNION代替UNION ALL。

Answer 4

那麼你可以採取這兩個輸出，然後總結。無需使用Union all或Union。

Declare @SumOfIncident int= (SELECT count(*) 

FROM eUser eUser2 RIGHT OUTER JOIN prcIncidentManagement ON (eUser2.eUserName=prcIncidentManagement.AssignedTo) INNER JOIN eFolder ON (prcIncidentManagement.EFOLDERID=eFolder.eFolderID) 

WHERE eFolder.eCreationTime between '01/01/2015' and '13/10/2015') 


Declare @requestOfFullfillment int= (SELECT count(*) 

FROM eUser eUser2 RIGHT OUTER JOIN prcIncidentManagement ON (eUser2.eUserName=prcIncidentManagement.AssignedTo) INNER JOIN eFolder ON (prcIncidentManagement.EFOLDERID=eFolder.eFolderID) 

WHERE eFolder.eCreationTime between '01/01/2015' and '13/10/2015') 

SELECT @SumOfIncident + @requestOfFullfillment