Question

我有一些SQL，其中一部分是with语句的一部分并且我一直收到一个错误，“NEWID”在使用sqlstate 42703的上下文中无效。

更新：错误一直来自group by子句，使用的函数我没有放入原始代码，因为我认为这不是问题。所以我更新了代码以显示完整版本

是否有人知道该陈述的问题是什么？

HATSTABLE1 (HATId, NewID) as (
select HA.HATId as "ID",
round(
  cast(
    sum(
      case when HA.ID = 4 or
        HA.ID < 0
        then 1 else 0 end
    ) AS FLOAT
  ) / count(*) * 100,
  2
) AS NewID
from Hats T
   join Heads HD on 
      T.ID=HD.HatID
group by T.ID
having NewID >1

Answer 1

试试吧

with tmp as (
select T.HATId as "ID", 
sum(case when T.ID = 4 or HA.ID < 0 then 1 else 0 end) as sum1, 
count(*) as nb
from Hats T
group by T.HATId 
)
select HATId, round(cast(sum1 as decimal)/ nb * 100, 2) NewID
from tmp

DB2 SQL，不能将列定义为

1 个答案: