Question

我有3个名为Invoice，Customer和Company的表。我想使用 Query 将这3个表合并为单个表。在发票表中包含客户ID和公司ID。如何加入3个表？

我尝试使用此查询正确处理Invoice和Customer Table。但我不想添加第3个表格。

SELECT RPT_Invoice_Less.InvoiceNumber, RPT_Invoice_Less.Terms,
    RPT_Invoice_Less.Invoicedate, RPT_Invoice_Less.OurQuote,
    RPT_Invoice_Less.SalesPerson, RPT_Customer.CustomerName,
    RPT_Customer.CustomerId, RPT_Customer.ContactPerson,
    RPT_Customer.BillingAddress, RPT_Customer.DeliveryAddress,
    RPT_Invoice_Less.OrderNumber, RPT_Invoice_Less.ShippingBy,
    RPT_Invoice_Less.ShipReferenceNo, RPT_Invoice_Less.Notes,
    RPT_Invoice_Less.Price, RPT_Invoice_Less.Discount,
    RPT_Invoice_Less.Shipping, RPT_Invoice_Less.Tax,
    RPT_Invoice_Less.GrandTotal, RPT_Invoice_Less.Company
FROM RPT_Invoice_Less
INNER JOIN RPT_Customer
ON RPT_Invoice_Less.CustomerId = RPT_Customer.CustomerId;

此代码适用于2个表

SELECT RPT_Invoice_Less.InvoiceNumber, RPT_Invoice_Less.Terms, RPT_Invoice_Less.Invoicedate, RPT_Invoice_Less.OurQuote, RPT_Invoice_Less.SalesPerson, RPT_Customer.CustomerName, RPT_Customer.CustomerId, RPT_Customer.ContactPerson, RPT_Customer.BillingAddress, RPT_Customer.DeliveryAddress, RPT_Invoice_Less.OrderNumber, RPT_Invoice_Less.ShippingBy, RPT_Invoice_Less.ShipReferenceNo, RPT_Invoice_Less.Notes, RPT_Invoice_Less.Price, RPT_Invoice_Less.Discount, RPT_Invoice_Less.Shipping, RPT_Invoice_Less.Tax, RPT_Invoice_Less.GrandTotal, RPT_OrionSystem.Company, RPT_OrionSystem.CompanyId
FROM RPT_Invoice_Less 
INNER JOIN RPT_Customer 
ON RPT_Invoice_Less.CustomerId = RPT_Customer.CustomerId
INNER JOIN RPT_OrionSystem
ON RPT_Invoice_Less.CompanyId = RPT_OrionSystem.CompanyId;

此代码显示语法错误。

帮我添加第3个 Company 表格。

Answer 1

假设CompanyID表或RPT_Customer中有RPT_Invoice_Less字段（或类似字段），只需添加另一个INNER JOIN

....
FROM ((RPT_Invoice_Less
INNER JOIN RPT_Customer
ON RPT_Invoice_Less.CustomerId = RPT_Customer.CustomerId)
INNER JOIN RPT_OrionSystem 
ON  RPT_Invoice_Less.CompanyID = RPT_OrionSystem.CompanyID)

MS Access数据库SQL查询

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