Question

对于SQL评估，我必须执行一个查询，我需要列出过去一个月由Salesman Code订购的汽车销售。我创建了一个SQL语句。但是，当我运行它时，除了我在查询中包含的列名之外，它根本没有列出任何内容。我使用的SQL代码如下：

SELECT CarForSale.SalesmanCode, 
  Salesman.SalesmanName, 
  Customer.CustomerCode, 
  Customer.CustomerName, 
  Customer.CustomerAddress
FROM 
(
  Centre 
  INNER JOIN Customer 
    ON Centre.CentreCode = Customer.CentreCode
) 
INNER JOIN CarForSale 
  ON (Customer.CustomerCode = CarForSale.CustomerCode) 
  AND (Centre.CentreCode = CarForSale.CentreCode), Salesman
WHERE CarForSale.CFSSoldDate BETWEEN CVDATE('01/02/2013') AND  CVDATE('01/03/2013')
ORDER BY Salesman.SalesmanCode;

如果有人有任何反馈或知道我哪里出错了，我会非常感谢这个问题的一些帮助。

以下是一些要求的示例数据：

CFS表

 CFSCode CFSMake CFSModel CFSSellingPrice 
 000001 Mercedes  W168         45000             

 CFSSoldDate CentreCode SalesmanCode CustomerCode
 01/03/2013   00000001   0000000001 00000001

推销员表

SalesmanCode SalesmanName SalemanCommThisYear SalesmanStatus CentreCode
0000000001    Liam Jones       2250         senior        00000001

客户表

CustomerCode    CustomerName    CustomerAddress   CentreCode    CustomerStatus
00000001    Gina Smith       1, The Lake,       00000002         good
                             Merthyr Tydfil

Answer 1

在您当前的查询中，您有一些不寻常的语法：

AND (Centre.CentreCode = CarForSale.CentreCode), Salesman -- what's this

我不确定, Salesman应该做什么。但是，如果您在JOIN表上尝试Salesman，那么您的查询将是：

SELECT CarForSale.SalesmanCode, 
  Salesman.SalesmanName, 
  Customer.CustomerCode, 
  Customer.CustomerName, 
  Customer.CustomerAddress
FROM ((Centre 
INNER JOIN Customer 
  ON Centre.CentreCode = Customer.CentreCode) 
INNER JOIN CarForSale 
  ON (Customer.CustomerCode = CarForSale.CustomerCode) 
  AND (Centre.CentreCode = CarForSale.CentreCode)))
INNER JOIN Salesman
  ON CarForSale.SalesmanCode = Salesman.SalesmanCode
WHERE CarForSale.CFSSoldDate BETWEEN #01/02/2013# AND #01/03/2013#
ORDER BY Salesman.SalesmanCode;

同样在MS Access中，当使用日期时，它们应该被磅标记#包围。您的查询应该是：

SELECT CarForSale.SalesmanCode, 
  Salesman.SalesmanName, 
  Customer.CustomerCode, 
  Customer.CustomerName, 
  Customer.CustomerAddress
FROM ((Centre 
INNER JOIN Customer 
  ON Centre.CentreCode = Customer.CentreCode) 
INNER JOIN CarForSale 
  ON (Customer.CustomerCode = CarForSale.CustomerCode) 
  AND (Centre.CentreCode = CarForSale.CentreCode)))
INNER JOIN Salesman
  ON CarForSale.SalesmanCode = Salesman.SalesmanCode
WHERE CarForSale.CFSSoldDate BETWEEN #01/02/2013# AND #01/03/2013#
ORDER BY Salesman.SalesmanCode;

编辑＃1，我不知道你为什么要加入Centre表，因为你没有使用它。我只是使用您的示例数据在MS Access中运行以下查询并获得结果：

SELECT CarForSale.SalesmanCode, 
  Salesman.SalesmanName, 
  Customer.CustomerCode, 
  Customer.CustomerName, 
  Customer.CustomerAddress
FROM (Customer 
INNER JOIN CarForSale 
  ON Customer.CustomerCode = CarForSale.CustomerCode)
INNER JOIN Salesman
  ON CarForSale.SalesmanCode = Salesman.SalesmanCode
WHERE CarForSale.CFSSoldDate BETWEEN #01/02/2013# AND #01/03/2013#
ORDER BY Salesman.SalesmanCode;

SQL Query涉及连接

1 个答案: