多個查詢在一個查詢中

Question

我有一個問題：

是否有可能在一個查詢中收集多個查詢？

即在一個窗體我有10個這樣的查詢：

1. SELECT ThisValue FROM thatTable1 WHERE 
2. SELECT ThisValue FROM thatTable2 WHERE 
       ....... 
10.  SELECT ThisValue FROM thatTable10 WHERE 

我應該在哪裏寫即該代碼Access.It可以在Access或只有我能做到這一點在MS SQL和... 。

CREATE PROC dbo.proc_app_CollectControlData 
AS 
    SET NOCOUNT ON 

    DECLARE @t TABLE 
    (
     CONTROLNAME nvarchar(74), 
     CONTROLVALUE nvarchar(255) 
    ) 

    -- Now we collect the data for the 10 different controls 
    INSERT INTO @t 
    (CONTROLNAME, CONTROLVALUE) 
    SELECT 'MyFirstControl', 
      ThisValue 
    FROM dbo.ThatTable 
    WHERE Condition1 

    ... 

    INSERT INTO @t 
    (CONTROLNAME, CONTROLVALUE) 
    SELECT 'MyTenthControl', 
      ThisValue 
    FROM dbo.ThatTable 
    WHERE Condition10 

    -- And now we return all found data to the client 
    SELECT * FROM @ 
    SET NOCOUNT OFF 
GO 

Answer 1

我認爲你正在尋找UNION Operator。

SELECT 'MyFirstControl' AS ControlName, ThisValue AS ControlValue 
FROM thatTable1 
WHERE Condition1 
UNION ALL 
SELECT 'MySecondControl' AS ControlName, ThisValue AS ControlValue 
FROM thatTable2 
WHERE Condition2 
UNION ALL 
SELECT 'MyThirdControl' AS ControlName, ThisValue AS ControlValue 
FROM thatTable3 
WHERE Condition3 

Answer 2

SELECT ThisValue FROM thatTable1 WHERE ... 
UNION ALL 
SELECT ThisValue FROM thatTable2 WHERE ... 
UNION ALL 
SELECT ThisValue FROM thatTable10 WHERE ...