Sql 为什么'；在我的查询中不交叉连接工作？

我试图在不使用sum和group by的情况下获取inv.ServicePrice的总和，但我的查询不起作用

ALTER PROCEDURE [dbo].[ServicesDetailedReport] 

        @FromDate date= '01-Jun-2010',
        @ToDate date= null

AS
BEGIN
        Set @ToDate= case when @ToDate IS NULL then Convert(varchar(11), getdate(), 106) else @ToDate end

        Select inv.InvoiceNo, inv.EntryDateTime, s.ServiceName, c.VehicleRegNo, inv.ServicePrice, c.CustomerName, inv.fk_BookingID
        from dbo.[Services] s
        inner join invoices inv
        on inv.fk_ServiceID= s.ServiceID
        inner join customers c
        on c.CustomerID= inv.fk_CustomerID
        Cross join (Select SUM(inc.ServicePrice) as TotalCost from dbo.Invoices inc as TotalCost) t
        where Convert(varchar(11), inv.EntryDateTime, 106) between @FromDate and @ToDate



END

更新：

**

Msg 156, Level 15, State 1, Procedure ServicesDetailedReport, Line 23
    Incorrect syntax near the keyword 'as'.

**这是你的问题：

from dbo.Invoices inc as TotalCost

SQL Server将隐式地将您的表别名，而不将

作为

关键字。因此，您的查询实际上按如下方式处理：

from dbo.Invoices AS inc AS TotalCost
                  ^      ^
                  |      |
                  |      |
                  |      |

基本上，您的表有两次别名，这是无效的语法

因此，这将是更新和正确的程序代码：

ALTER PROCEDURE dbo.ServicesDetailedReport
    @FromDate DATE = '01-Jun-2010',
    @ToDate DATE = NULL
AS
BEGIN
    SET @ToDate = ISNULL(@ToDate, GETDATE());

    SELECT inv.InvoiceNo, inv.EntryDateTime, s.ServiceName, c.VehicleRegNo, inv.ServicePrice, c.CustomerName, inv.fk_BookingID
    FROM dbo.services AS s
    INNER JOIN invoices AS inv
        ON inv.fk_ServiceID = s.ServiceID
    INNER JOIN customers AS c
        ON c.CustomerID = inv.fk_CustomerID
    CROSS JOIN (   SELECT SUM(inc.ServicePrice) AS TotalCost
                   FROM dbo.Invoices AS inc) AS t
    WHERE inv.EntryDateTime BETWEEN @FromDate AND @ToDate;
END;

另外请注意，我用一个简单的

ISNULL（）

替换了您的case语句，并删除了查询中的冗余convert运算符，它们是不需要的。

这是您的问题：

from dbo.Invoices inc as TotalCost

SQL Server将隐式地将您的表别名，而不将

作为

关键字。因此，您的查询实际上按如下方式处理：

from dbo.Invoices AS inc AS TotalCost
                  ^      ^
                  |      |
                  |      |
                  |      |

基本上，您的表有两次别名，这是无效的语法

因此，这将是更新和正确的程序代码：

ALTER PROCEDURE dbo.ServicesDetailedReport
    @FromDate DATE = '01-Jun-2010',
    @ToDate DATE = NULL
AS
BEGIN
    SET @ToDate = ISNULL(@ToDate, GETDATE());

    SELECT inv.InvoiceNo, inv.EntryDateTime, s.ServiceName, c.VehicleRegNo, inv.ServicePrice, c.CustomerName, inv.fk_BookingID
    FROM dbo.services AS s
    INNER JOIN invoices AS inv
        ON inv.fk_ServiceID = s.ServiceID
    INNER JOIN customers AS c
        ON c.CustomerID = inv.fk_CustomerID
    CROSS JOIN (   SELECT SUM(inc.ServicePrice) AS TotalCost
                   FROM dbo.Invoices AS inc) AS t
    WHERE inv.EntryDateTime BETWEEN @FromDate AND @ToDate;
END;

---

还要注意的是，我用一个简单的

ISNULL（）

替换了您的case语句，并删除了查询中多余的convert运算符，它们是不需要的。

您使用两次别名，然后使用第一个别名
修正：

---

您可以使用两个别名，然后使用第一个别名
修正：

---

只需删除交叉联接中“AS TotalCost”中使用的“AS”

  Select inv.InvoiceNo, inv.EntryDateTime, s.ServiceName, c.VehicleRegNo, inv.ServicePrice, c.CustomerName, inv.fk_BookingID
    from dbo.[Services] s
    inner join invoices inv
    on inv.fk_ServiceID= s.ServiceID
    inner join customers c
    on c.CustomerID= inv.fk_CustomerID
    Cross join (Select SUM(inc.ServicePrice) as TotalCost from dbo.Invoices inc ) t
    where Convert(varchar(11), inv.EntryDateTime, 106) between @FromDate and @ToDate

---

只需删除交叉联接中“AS TotalCost”中使用的“AS”

  Select inv.InvoiceNo, inv.EntryDateTime, s.ServiceName, c.VehicleRegNo, inv.ServicePrice, c.CustomerName, inv.fk_BookingID
    from dbo.[Services] s
    inner join invoices inv
    on inv.fk_ServiceID= s.ServiceID
    inner join customers c
    on c.CustomerID= inv.fk_CustomerID
    Cross join (Select SUM(inc.ServicePrice) as TotalCost from dbo.Invoices inc ) t
    where Convert(varchar(11), inv.EntryDateTime, 106) between @FromDate and @ToDate

---

它怎么不起作用？你能进一步解释一下吗？没有结果？结果是错误的？为什么要将日期转换为字符串？@Squirrel error updated它是如何工作的？你能进一步解释一下吗？没有结果？结果是错误的？为什么要将日期转换为字符串？@Squirrel error updated