Sql server 如何在SQL Server查询中联系动态@where子句？

我已根据SQL Server中选择的选项创建了一个动态

where

子句，但当我在SQL查询的末尾添加此动态

where

字符串时，我收到以下错误消息：

转换varchar值“Where…”时失败。。。。。到数据类型 整数

这是我的疑问：

lter PROCEDURE [dbo].[GetDailyLogSearchReportLegalNew]  @FilterBy varchar(100),@BranchFilter varchar(100), @Status varchar(100), @dtFrom date, @dtTo date                                    

AS                                 

-- exec GetDailyLogSearchReportLegalnew @FilterBy = 'BRANCH',@BranchFilter = 'CHICAGO',@Status ='B',  @dtFrom = '06-01-2015', @dtTo ='07-24-2015'                           

declare @Query NVARCHAR(Max)      

declare @Where varchar(1000)      

declare @Query1 NVARCHAR(Max)      

declare @Where1 varchar(1000)      

declare @Merge NVARCHAR(Max)      

if(@FilterBy = 'BRANCH' and @BranchFilter = 'ALL')                                                                        

BEGIN       
    if(@Status = 'B')      

    BEGIN      
        set @Where = '  Where     
        LG_BillTo=0   AND  dbo.LegalMain.LG_ReceivedDate  >= '+''''+ convert(varchar(25),Convert(date,@dtFrom)) +' '+'00:00:00.000'' AND  dbo.LegalMain.LG_ReceivedDate  <= '''+ convert(varchar(25),Convert(date,@dtTo)) +' '+'23:59:59.999'''      
    END      

    else if(@Status = 'C')      

    BEGIN      
        set @Where = 'WHERE       
        LG_BillTo=0   AND  dbo.LegalMain.LG_ActualDateCompleted  >= '+''''+ convert(varchar(25),Convert(date,@dtFrom)) +' '+'00:00:00.000'' AND  dbo.LegalMain.LG_ActualDateCompleted  <= '''+ convert(varchar(25),Convert(date,@dtTo)) +' '+'23:59:59.999'''      
    END      

    else if(@Status = 'I')      

    BEGIN      
        set @Where = 'WHERE       
        LG_BillTo=0   AND  dbo.LegalMain.LG_ReceivedDate  >= '+''''+ convert(varchar(25),Convert(date,@dtFrom)) +' '+'00:00:00.000'' AND  dbo.LegalMain.LG_ReceivedDate  <= '''+ convert(varchar(25),Convert(date,@dtTo)) +' '+'23:59:59.999'' And dbo.LegalMain.LG_ActualDateCompleted is null'      
    END       
END      


SELECT LEFT(LG_CreationTime,5) as 'Status', dbo.LegalMain.LG_LegalID AS ID,

    dbo.LegalMain.LG_ReceivedDate AS 'Received Date', Forwarder.CST_ShortName AS 'Customer', 

    dbo.City.CTY_CityName AS 'City', Shipper.CST_FullName AS 'Shipper',  

    dbo.LegalMain.LG_ReferenceNo AS 'Ref No',  dbo.Country.CNT_CountryName AS 'Country',

    dbo.LegalBranch.BR_BranchName AS Branch, ST_ServiceType AS 'Service Type',  

    dbo.LegalMain.LG_ActualDateCompleted  AS NewCompleted,   

    SN_SentTo as 'Sent To',LG_COPREP as CO, LG_InoviceNo AS 'Invoice No'    

FROM dbo.LegalBranch 

    RIGHT OUTER JOIN dbo.LegalMain ON dbo.LegalBranch.BR_ID = dbo.LegalMain.LG_BranchId 

    LEFT OUTER JOIN dbo.Country ON dbo.LegalMain.LG_CountryID = dbo.Country.CNT_CountryID 

    LEFT OUTER JOIN dbo.Customer AS Forwarder 

    LEFT OUTER JOIN dbo.City ON Forwarder.CST_CityID = dbo.City.CTY_CityID ON dbo.LegalMain.LG_ForwarderID = Forwarder.CST_CustomerID  

    LEFT OUTER JOIN dbo.LegalServiceType ON dbo.LegalMain.LG_ServiceTypeId = dbo.LegalServiceType.ST_ServiceTypeID  

    LEFT OUTER JOIN dbo.LegalSentTo ON dbo.LegalMain.LG_SentToId = dbo.LegalSentTo.SN_ID   

    LEFT OUTER JOIN dbo.Customer AS Shipper ON dbo.LegalMain.LG_ShipperID = Shipper.CST_CustomerID  & ' ' & cast(@Where as varchar(1000)) 

lter过程[dbo]。[GetDailyLogSearchReportLegalNew]@FilterBy varchar（100）、@BranchFilter varchar（100）、@Status varchar（100）、@dtFrom date、@dtTo date
作为
--exec GetDailyLogSearchReportLegalnew@FilterBy='BRANCH'，@BranchFilter='芝加哥'，@Status='B'，@dtFrom='06-01-2015'，@dtTo='07-24-2015'
声明@Query NVARCHAR（最大值）
声明@Where varchar（1000）
声明@Query1 NVARCHAR（最大值）
声明@Where1 varchar（1000）
声明@Merge-NVARCHAR（最大值）
if（@FilterBy='BRANCH'和@BranchFilter='ALL'）
开始
如果（@Status='B'）
开始
设置@Where='Where
LG_BillTo=0和dbo.LegalMain.LG_ReceivedDate>='+''''转换（varchar（25），convert（date，@dtFrom））+'+'00:00:00.000''和dbo.LegalMain.LG_ReceivedDate='+''''转换（varchar 25，convert（date，@dtFrom））+'+'+''+'00:00:00.000''和dbo.LegalMain实际完成日期='+''+转换（varchar 25，convert（date，@dtFrom））++'+'00:00:00.000''和dbo.LegalMain.LG_ReceivedDate问题在于您将代码和内容混为一谈；包含代码的变量不会自动转换为可执行的内容；系统不理解你的意图

相反，创建要在变量中运行的完整代码，然后告诉SQL执行该变量中包含的代码

Declare @myWhere nvarchar(max)
, @mySql nvarchar(max)
--for the sake of illistration
set @myWhere = 'where ID < 200'

set @mySql = 'Select ID from myTable ' + @myWhere
exec sp_executesql @mySql
--or exec(@mySql)

您希望上述的输出是什么

此处为可运行版本：


更新

根据您修改后的问题/代码，以下内容可能会满足您的要求，而无需使用动态SQL

SELECT LEFT(LG_CreationTime,5) as 'Status'
, dbo.LegalMain.LG_LegalID AS ID
, dbo.LegalMain.LG_ReceivedDate AS 'Received Date'
, Forwarder.CST_ShortName AS 'Customer'
, dbo.City.CTY_CityName AS 'City'
, Shipper.CST_FullName AS 'Shipper'
, dbo.LegalMain.LG_ReferenceNo AS 'Ref No'
, dbo.Country.CNT_CountryName AS 'Country'
, dbo.LegalBranch.BR_BranchName AS Branch
, ST_ServiceType AS 'Service Type'
, dbo.LegalMain.LG_ActualDateCompleted  AS NewCompleted
, SN_SentTo as 'Sent To'
, LG_COPREP as CO
, LG_InoviceNo AS 'Invoice No'    
FROM dbo.LegalMain 
LEFT OUTER JOIN dbo.LegalBranch  
    ON dbo.LegalBranch.BR_ID = dbo.LegalMain.LG_BranchId 
LEFT OUTER JOIN dbo.Country 
    ON dbo.Country.CNT_CountryID = dbo.LegalMain.LG_CountryID
LEFT OUTER JOIN dbo.Customer AS Forwarder 
    ON Forwarder.CST_CustomerID = dbo.LegalMain.LG_ForwarderID 
LEFT OUTER JOIN dbo.City 
    ON dbo.City.CTY_CityID = Forwarder.CST_CityID 
LEFT OUTER JOIN dbo.LegalServiceType 
    ON dbo.LegalServiceType.ST_ServiceTypeID = dbo.LegalMain.LG_ServiceTypeId 
LEFT OUTER JOIN dbo.LegalSentTo 
    ON dbo.LegalSentTo.SN_ID = dbo.LegalMain.LG_SentToId 
LEFT OUTER JOIN dbo.Customer AS Shipper 
    ON Shipper.CST_CustomerID = dbo.LegalMain.LG_ShipperID
WHERE (NOT (@FilterBy = 'BRANCH' and @BranchFilter = 'ALL'))
OR
(
    LG_BillTo = 0
    AND
    (
        (
            @Status = 'B'
            AND dbo.LegalMain.LG_ReceivedDate between @dtFrom and DATEADD(second,-1,DATEADD(day,1,@dtTo))  
        )
        OR
        (
            @Status = 'C'
            AND dbo.LegalMain.LG_ActualDateCompleted between @dtFrom and DATEADD(second,-1,DATEADD(day,1,@dtTo))     
        )
        OR
        (
            @Status = 'I'
            AND dbo.LegalMain.LG_ReceivedDate between @dtFrom and DATEADD(second,-1,DATEADD(day,1,@dtTo)) 
            And dbo.LegalMain.LG_ActualDateCompleted is null  
        )
    )
)

注意：此代码未经测试，可能会执行得很糟糕，因为有很多连接/条件。我不建议在生产环境中使用此代码，而是让SQL开发人员提供帮助，指定您的功能需求，并向他们提供运行此功能的数据库副本。
请显示一些代码。列是动态生成的还是动态传递给列的值您认为为什么需要“动态where”？动态SQL是一种非常强烈的气味，它会导致性能和安全问题，但毫无益处。如果要创建具有不同条件的查询，请在客户机上执行此操作，例如使用ORM或参数化查询代码很难阅读，但包含许多问题，例如将日期转换为文本以与日期列进行比较？字符串串联只会使检测转换或引用错误变得不可能。至少，创建一个视图，而不是在语句中连接所有这些表。这将删除至少11行错误在最后一行（@Where as varchar（1000））我们不能修复吗这是我的完整查询我不使用exec我只需要在查询中使用一个简单的select with Where子句不想使用sp的exec_executesql@Jim您必须使用
exec
或更好的
sp\u executesql
。更好的是，不要这样做。使用LINQ的ORM是使用更改的标准创建查询的更好选项错误在最后一行-“”&cast（@Where as varchar（1000））中我们不能修复吗it@Jim你为什么这么认为？很可能@Where语句无效。无论如何，不能用变量代替WHERE语句。SQL不是这样工作的。您必须创建一个字符串并使用
exec
或
sp_executesql
SELECT LEFT(LG_CreationTime,5) as 'Status'
, dbo.LegalMain.LG_LegalID AS ID
, dbo.LegalMain.LG_ReceivedDate AS 'Received Date'
, Forwarder.CST_ShortName AS 'Customer'
, dbo.City.CTY_CityName AS 'City'
, Shipper.CST_FullName AS 'Shipper'
, dbo.LegalMain.LG_ReferenceNo AS 'Ref No'
, dbo.Country.CNT_CountryName AS 'Country'
, dbo.LegalBranch.BR_BranchName AS Branch
, ST_ServiceType AS 'Service Type'
, dbo.LegalMain.LG_ActualDateCompleted  AS NewCompleted
, SN_SentTo as 'Sent To'
, LG_COPREP as CO
, LG_InoviceNo AS 'Invoice No'    
FROM dbo.LegalMain 
LEFT OUTER JOIN dbo.LegalBranch  
    ON dbo.LegalBranch.BR_ID = dbo.LegalMain.LG_BranchId 
LEFT OUTER JOIN dbo.Country 
    ON dbo.Country.CNT_CountryID = dbo.LegalMain.LG_CountryID
LEFT OUTER JOIN dbo.Customer AS Forwarder 
    ON Forwarder.CST_CustomerID = dbo.LegalMain.LG_ForwarderID 
LEFT OUTER JOIN dbo.City 
    ON dbo.City.CTY_CityID = Forwarder.CST_CityID 
LEFT OUTER JOIN dbo.LegalServiceType 
    ON dbo.LegalServiceType.ST_ServiceTypeID = dbo.LegalMain.LG_ServiceTypeId 
LEFT OUTER JOIN dbo.LegalSentTo 
    ON dbo.LegalSentTo.SN_ID = dbo.LegalMain.LG_SentToId 
LEFT OUTER JOIN dbo.Customer AS Shipper 
    ON Shipper.CST_CustomerID = dbo.LegalMain.LG_ShipperID
WHERE (NOT (@FilterBy = 'BRANCH' and @BranchFilter = 'ALL'))
OR
(
    LG_BillTo = 0
    AND
    (
        (
            @Status = 'B'
            AND dbo.LegalMain.LG_ReceivedDate between @dtFrom and DATEADD(second,-1,DATEADD(day,1,@dtTo))  
        )
        OR
        (
            @Status = 'C'
            AND dbo.LegalMain.LG_ActualDateCompleted between @dtFrom and DATEADD(second,-1,DATEADD(day,1,@dtTo))     
        )
        OR
        (
            @Status = 'I'
            AND dbo.LegalMain.LG_ReceivedDate between @dtFrom and DATEADD(second,-1,DATEADD(day,1,@dtTo)) 
            And dbo.LegalMain.LG_ActualDateCompleted is null  
        )
    )
)