我想选择所有客户(id_cust属性)和可获得的收入总和(收入归属),这些客户在2016年具有交易(收入)(incomedate attrib)但在2017年没有交易(收入)所以所有交易都在一张表中。
id_cust income incomedate
123 101 2/5/2016
123 211 6/1/2017
221 900 9/7/2017
221 300 8/9/2016
....
答案 0 :(得分:0)
每位客户的收入总和
SharedPreferences
每位客户每年的收入总和
select sum(income),id_cust
from customertable
group by id_cust
答案 1 :(得分:0)
您可以尝试如下:
select t1.id_cust, sum(t1.income)
from customertable t1
WHERE
to_char(t1.incomedate, 'YYYY') = '2016'
and not exists (
SELECT 1
FROM customertable t2
WHERE t2.id_cust = t1.id_cust
AND to_char(t2.incomedate,'YYYY') = '2017'
)
group by t1.id_cust;
希望有所帮助。