sql - 我怎样才能做下面的查询来获取所需的信息

Question

我有两个表

• CompList 表，包含以下列:CompId、McID、station、slot 、subslot 和其他几个

• BookingTable 包含列:CompId 、LineID 、McID 、station , slot , subslot.

我想得到以下结果:

只记录 CompList.CompId == BookingTable.CompId(只有两个表中都有的 CompId)

我需要在 CompList 的结果列中:CompId , McID , station , slot ,subslot 和来自 BookingTable: LineID , McID , station , 插槽 ,子插槽

我将如何区分结果表中具有相同表的相同列与结果表中的相同列？

感谢您的帮助。

Answer 1

使用别名:

SELECT 
    CL.CompId,
    CL.McID,
    CL.station,
    CL.slot,
    CL.subslot,
    BT.LineID,
    BT.McID     as BookingMcId, 
    BT.station  as BookingStation, 
    BT.slot     as BookingSlot, 
    BT.subslot  as BookingSubslot
FROM CompList as CL
JOIN BookingTable as BT ON BT.CompId = CL.CompId