如何在sql中合併兩個不同列的表格

Question

我有兩個表名爲booked_flat和master_flat。的booked_flats

列

customer_name, customer_address, customer_phone, building_wing_no, building_name_no, flat_no 

的master_flats列

​​

當任平獲取預訂的狀態得到改變爲其他出售狀態仍然流拍。

銷售狀態的所有條目都在booking_flats中。

我曾試圖合併這兩表，但它給出了一個錯誤，請幫我

$sql = SELECT * FROM 'booked_flats' 
     UNION SELECT * FROM 'master_flats' 
      WHERE building_wing_no, building_name_no, flat_no NOT IN (
       SELECT building_wing_no, building_name_no, flat_no from booked_flats); 

例如：

**master_flat:** 

building_wing_no building_name_no flat_no status    
----------------------------------------------- 
    a    a2   104 unsold 
------------------------------------------------- 
    b    a3   105 sold 




booked_flat: 
    custo_name custo_add custo_ph building_wing_no building_name_no flat_no 
    --------------------------------------------------------------------------- 
    harish  wardha  284632  b    a3   105 



I want result like 

    cust_name cust_add custo_ph building_wing_no building_name_no flat_no status 
    harish wardha 284632   b   a3    105    
     ---  ---  ---   a   a2    104 unsold 

Answer 1

我想你真正想要做的是一個join而不是union，但你應該更新你的問題並寫出你想要顯示的內容。

SELECT * FROM booked_flats b 
JOIN master_flats m ON b.building_wing_no = m.building_wing_no 
    AND b.building_name_no = m.building_name_no AND b.flat_no = m.flat_no;