Bigquery - ＆＃39;拥有＆＃39;没有按预期工作

Question

我有查询：

SELECT date(date) as day, App, count(*) as cnt,
avg(cnt) over (partition by App) as avg_per_day

FROM [DATABASE]

group by date,two_hour, App

现在我基本上只想停留平均每天下载量超过5次的应用。但是，当我添加having avg_per_day>5时，我得到了

  

Field＆＃39; avg_per_day＆＃39;没找到。

同时输入where avg(cnt) over (partition by App) > 5也不起作用。

我做错了什么？

我不想使用双SELECT，因为每个查询都需要花钱，而且它们应该每小时运行一次。

由于

Answer 1

OVER（）函数在HAVING步骤之后运行 - 因此在HAVING阶段，avg_per_day列仍然不存在。

而不是：

SELECT date(date) as day, App, count(*) as cnt,
avg(cnt) over (partition by App) as avg_per_day
FROM [DATABASE]
group by date,two_hour, App
having avg_per_day>5

尝试：

SELECT day, App, cnt, avg_per_day
FROM (
SELECT date(date) as day, App, count(*) as cnt,
avg(cnt) over (partition by App) as avg_per_day
FROM [DATABASE]
group by date,two_hour, App
)
WHERE avg_per_day>5

成本方面应该是一样的。