如何 Select 来自两个不同 table(A,B) 的列，其中 sum(column tableA) 小于 columntableB

Question

我可以 select 总和（税）低于价格的价格，我正在执行查询但出现错误

select    b.price
from tableA a
inner join tableB b on b.idprice = a.idprice where sum(tax)<price
group by a.idprice,b.price

Answer 1

所以像这样：

SELECT t.*,s.*
FROM TableA t
INNER JOIN(SELECT idprice,sum(tax) as sum_tax
           FROM TableB
           GROUP BY idprice) s
ON(t.idprice = s.idprice and t.price < s.sum_tax)

或者如果价格 table 也应该相加：

SELECT t.idprice,sum(t.price),max(s.sum_tax)
FROM TableA t
INNER JOIN(SELECT idprice,sum(tax) as sum_tax
           FROM TableB
           GROUP BY idprice) s
ON(t.idprice = s.idprice)
GROUP BY t.idprice
having sum(t.price) < max(s.sum_tax)

Answer 2

我认为您原来的方法可以通过使用 having 子句而不是 where:

select b.price
from tableA a inner join
     tableB b
     on b.idprice = a.idprice
group by a.idprice, b.price
having sum(tax) < b.price;