T-SQL和存储过程通过相同的查询给出不同的结果

Question

我是新来的。有一个奇怪的问题。我的T-SQL查询返回69行，但是存储过程中的同一查询返回零结果。

在StackOverflow的其中一篇文章中，有人切换了EXEC语句中的参数/变量，但这对我也不起作用，如下所示。

除了BETWEEN，我还尝试了>=和<=，但没有运气。

谢谢。

SELECT 
    T1.CustKey
FROM 
    INVOICEROWS T0 
INNER JOIN 
    INVOICE T1 ON T1.INVKEY = T0.INVKEY 
INNER JOIN 
    ITEMS T2 ON T2.PARTCODE = T0.PARTCODE  
INNER JOIN 
    CUSTOMERS T5 ON T5.CustKey = T1.CustKey
WHERE 
    T1.INVDATE BETWEEN '2018-03-26' AND '2018-03-26'
    AND ((T1.CustKey BETWEEN 'ABC' AND 'ABC') OR (T5.CustGroupKey = ''))
    AND ((T0.ItemKey BETWEEN 'PQR' AND 'STU') OR (T2.ItemGroupKey = ''))

结果：69行具有相同的值“ ABC”（正确）

ALTER PROCEDURE [dbo].[PROC1]
    (@DATEFROM AS DATE,
     @DATETO AS DATE,
     @CUSTKEYFROM AS NVARCHAR,
     @CUSTKEYTO AS NVARCHAR,
     @CUSTGROUPKEY AS SMALLINT,
     @ItemKeyFrom NVARCHAR(20),
     @ItemKeyTo NVARCHAR(20),
     @ItemGroupKey NVARCHAR(11)
    )
AS
BEGIN
    SET NOCOUNT ON;

    -- Insert statements for procedure here
    SELECT 
        T1.CustKey
    FROM 
        INVOICEROWS T0 
    INNER JOIN 
        INVOICE T1 ON T1.INVKEY = T0.INVKEY 
    INNER JOIN 
        ITEMS T2 ON T2.PARTCODE = T0.PARTCODE  
    INNER JOIN 
        CUSTOMERS T5 ON T5.CustKey = T1.CustKey
    WHERE 
        T1.INVDATE BETWEEN @DATEFROM AND @DATETO
        AND ((T1.CustKey BETWEEN @CUSTKEYFROM AND @CUSTKEYTO) OR (T5.CustGroupKey = @CUSTGROUPKEY))
        AND ((T0.ItemKey BETWEEN @ItemKeyFrom AND @ItemKeyTo) OR (T2.ItemGroupKey = @ItemGroupKey))
END

运行此存储过程：

EXEC PROC1 '2018-03-26', '2018-03-26', 'ABC', 'ABC', '', 'PQR', 'STU', '' 

返回零行

EXEC PROC1 '2018-03-26', '2018-03-26', 'ABC', 'PQR', '', 'ABC', 'STU', '' 

也返回零行

Answer 1

我敢打赌，您的问题是两个存储过程参数的声明错误：

ALTER PROCEDURE [dbo].[PROC1]
    (@DATEFROM AS DATE,
     @DATETO AS DATE,
     @CUSTKEYFROM AS NVARCHAR,
     @CUSTKEYTO AS NVARCHAR,
     @CUSTGROUPKEY AS SMALLINT,
     @ItemKeyFrom NVARCHAR(20),
     @ItemKeyTo NVARCHAR(20),
     @ItemGroupKey NVARCHAR(11)
    )

你拥有@CUSTKEYFROM并@CUSTKEYTO宣布为正义NVARCHAR。这意味着：您得到的字符串长度恰好是一个字符！这很少是您期望或想要的。

尝试这两个参数声明，长度 -你应该总是做的！-我敢打赌，您的存储过程将返回所需的结果！

ALTER PROCEDURE [dbo].[PROC1]
    (@DATEFROM AS DATE,
     @DATETO AS DATE,
     -- add explicit LENGTH to the NVARCHAR! However long you need it
     @CUSTKEYFROM AS NVARCHAR(25),
     @CUSTKEYTO AS NVARCHAR(25),

请参阅不良习惯：立即宣告VARCHAR不带（长度），以更好地，全面地解释您应该真正善待的“不良习惯”