如何使用 OVER PARTITION BY 改进 SQL Teradata

Question

我有一个超过 7 列的查询，其中包含一些 counts() 和 sum() 值，我很慢，然后我尝试使用 OVER PARTITION BY，但结果 table 我有一个错误 "Selected non-aggregate values must be part of the associated group"。

这是查询：

insert into  SQUEMA.TABLE_B
select 
SUBSTR(cast(date as char(6)) ,1,4) ||'-'|| SUBSTR(cast(date as char(6)) ,5,6) as date ,
column1,
column2,
column3,
.
.
.
.
column7,
count(column8) OVER (PARTITION BY date, column1,...,column7) as column8
SUM(column9) OVER(ORDER BY date ) as column9
from  SQUEMA.TABLE_A tb 
where tb.date between '201711' and '201812'
group by date, column1,...,column7;

错误

Selected non-aggregate values must be part of the associated group

Answer 1

我相信你想要：

sum(count(column8)) OVER (PARTITION BY date, column1,...,column7) as column8
sum(sum(column9))) OVER (ORDER BY date ) as column9

这就是 window 聚合函数的使用方式。

如何使用 OVER PARTITION BY 改进 SQL Teradata

How to improve SQL Teradata with OVER PARTITION BY

sql

teradata