配置单元查询派生列并查找派生列的总数 [英] Hive query for derived columns and find the total of derived column

问题描述

我有一个方案，其中credit_Date，debit_date和loan_date可以相同.输出表具有以下列

I have a scenario where credit_Date, debit_date and loan_date can be same. Output table have below columns

日期:应结合credit_date，debit_date和loan_date(credit_date，debit_date和loan_date可以相同(或为null)

Date: should combine credit_date, debit_date and loan_date ( credit_date, debit_date and loan_date can be same (or) null)

贷方付款:查找给定贷方日期，实体，货币，所有者的贷方金额之和

Credit_payment: Find the sum of credit amount for a given credit_date, entity, currency, owner

借方付款:查找给定借方日期，实体，货币，所有者的借方金额之和

Debit_payment: Find the sum of debit amount for a given debit_date, entity, currency, owner

贷款还款:查找给定贷款日期，实体，货币，所有者，

Loan_payment: Find the sum of loan amount for a given loan_date, entity, currency, owner,

实体:值

currency:值

所有者:值

总计:(贷记付款+借记付款+贷款付款)的总和

Total : sum of ( credit_payment + debit_payement+ loan_payment)

我在下面的查询中尝试过，但是没有用

I tried below query but not working

insert into table2 
select *
from (
    select credit_date as date, sum(credit_amount) as credit_payment, null as debit_payment, null as loan_payment, entity, owner, currency
    from table1
    group by credit_date, entity, owner, currency
    union all
    select debit_date as date, null as credit_payment, sum(debit_amount) as debit_payment, null as loan_payment, entity, owner, currency
    from table1
    group by debit_date, entity,owner, currency 
    union all
    select loan_date as date, null as credit_payment, null as debit_payment, sum(loan_amount) as loan_payment, entity, owner, currency
    from table1
    group by loan_date, entity, owner, currency
) t
order by date;

推荐答案

您可以使用 coalesce 组合三个日期，然后再分组.它将处理空值.

You can use coalesce to combine the three dates before group by. It will take care of the nulls.

select coalesce(credit_date, debit_date, loan_date) as date, 
       sum(credit_amount) as credit_payment, 
       sum(debit_amount) as debit_payment,
       sum(loan_amount) as loan_payment,
       entity, currency, owner,
       sum(credit_amount) + sum(debit_amount) + sum(loan_amount) as Total
from table1
group by coalesce(credit_date, debit_date, loan_date), entity, currency, owner

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