where 子句中不允许使用 order 分析函数

Question

我正在尝试实现以下目标，但面临诸如 where 子句中不允许的订单分析功能之类的错误

select  a.araccno,a.ARBDTE,
sum(aramt) over( partition by araccno,ARBDTE  ORDER BY ARAMT asc) sum1
,sum(b.Bill_Stmt_Discount_Amt) over( partition by b.bill_statement_id order by b.Bill_Stmt_Discount_Amt asc) sum2
from stg.ars_etl  a
left outer join  tgt.bill_sta_dis  b
on 'LL'||a.araccno||a.arbdte=b.bill_statement_id
where  sum1<> sum2

如何在 Teradata 中实现这一点？

非常感谢！！

Answer 1

在大多数数据库中，您会使用子查询或 CTE。 Teradata 有qualify 子句：

select a.araccno, a.ARBDTE,
       sum(aramt) over( partition by araccno,ARBDTE  ORDER BY ARAMT asc) as sum1,
       sum(b.Bill_Stmt_Discount_Amt) over (partition by b.bill_statement_id order by b.Bill_Stmt_Discount_Amt asc) as sum2
from stg.ars_etl a left outer join
     tgt.bill_sta_dis  b
     on 'LL'||a.araccno||a.arbdte = b.bill_statement_id
qualify sum1 <> sum2;