mysql - 带子查询的 ON DUPLICATE KEY UPDATE 查询

Question

我有一个表，其中插入的值是另一个表中价格的平均值。我正在使用 ON DUPLICATE KEY UPDATE 查询，但问题是我正在更新子查询中的值，并且它返回列不能为空的错误。

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

任何人都可以纠正我的 mysql 查询吗？

Answer 1

您可以使用:

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

VALUES() 返回如果没有重复项则将插入的值。