SQL语句..具有相同多个Id的多个表

Question

我正在使用VB.Net连接到SQL Server 2008

此作品 - ＆gt; Dim query =“SELECT wo.WorkOrderID，wo.WorkOrderNo FROM dbo.WorkOrder wo”

这不起作用 - ＆gt; Dim query =“SELECT wo.WorkOrderID，wo.WorkOrderNo，wod.LineNo FROM dbo.WorkOrder wo，dbo.WorkOrderDetails wod”

这也不起作用 - ＆gt; Dim query =“SELECT wo.WorkOrderID，wo.WorkOrderNo，wod.LineNo FROM dbo.WorkOrder wo，dbo.WorkOrderDetails wod WHERE wo.WorkOrderID = wod.WorkOrderID“

我假设它，因为在WorkOrderDetails中，WorkOrderId具有多个相同的ID

• 在WorkOrder中，WorkOrderID似乎是增量的...... 1,2,3等..
• 在WorkOrderDetails中，WorkOrderID就像这样.. 1,1,1,1,1,1,2,2,2,2,3,3,3,3,3等..

有关如何使其发挥作用的任何想法？我无法理解......

• 关键字“LineNo”附近的Incorrent语法。是我得到的错误

我刚试过这个 - ＆gt; “SELECT WorkOrderID，WorkOrderNo，LineNo FROM dbo.WorkOrder JOIN dbo.WorkOrderDetails ON dbo.WorkOrder.WorkOrderID = dbo.WorkOrderDetails.WorkOrderID”

似乎没有工作..同样的错误

Answer 1

LineNo是reserved keyword。使用Delimited Identifier。

SELECT WorkOrderID, WorkOrderNo, [LineNo]
FROM dbo.WorkOrder
  JOIN dbo.WorkOrderDetails
    ON dbo.WorkOrder.WorkOrderID = dbo.WorkOrderDetails.WorkOrderID

Answer 2

使用join：

Dim query = 
"SELECT wo.WorkOrderID,
       wo.WorkOrderNo, 
       wod.[LineNo] FROM dbo.WorkOrder wo
                 JOIN dbo.WorkOrderDetails wod 
                 ON wo.WorkOrderID = wod.WorkOrderID"

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