使用子查询打开DUPLICATE KEY UPDATE查询

Question

我有一张表，我在其中插入价值，这是另一张表中价格的平均值。 我正在使用ON DUPLICATE KEY UPDATE查询，但问题是我正在从子查询更新值，并且它返回错误，该列不能为空。

insert into `averge_figures` (`full_postcode`,`property_type`,`bedrooms`,`rental_figure`)
    select p.full_postcode,p.property_type,p.bedrooms,

    ((select avg(p2.price) as price1 from property p2  where p.full_postcode=p2.full_postcode and p.bedrooms=p2.bedrooms
      and p.property_type=p2.property_type and p2.trans_type_id=2 )+
     (select avg(s.price) as price2 from sale_detail s where s.proptype=p.property_type and s.bedrooms=p.bedrooms 
     and s.postcode=p.full_postcode and s.rentorsale='R'))/2 

   from property p 
 ON DUPLICATE KEY UPDATE  `rental_figure`=

 ((select avg(p2.price) as price1 from property p2  where p.full_postcode=p2.full_postcode and p.bedrooms=p2.bedrooms
  and p.property_type=p2.property_type and p2.trans_type_id=2 )+
 (select avg(s.price) as price2 from sale_detail s where s.proptype=p.property_type and s.bedrooms=p.bedrooms 
 and s.postcode=p.full_postcode and s.rentorsale='R'))/2

任何正文都可以更正我的mysql查询。

Answer 1

您可以使用：

ON DUPLICATE KEY UPDATE  `rental_figure` = VALUES(`rental_figure`)

如果没有重复，

VALUES()将返回插入的值。