Presto SQL 查询以计算观看百分比

Question

我必须计算每个类别的贡献百分比。

SELECT portfolio, (total_portfolio_views*1.00000/total_views)*100 view_contribution_perc
FROM(
select portfolio,sum(portfolio_views) AS total_portfolio_views, (select sum(portfolio_views) from gold.user_daily_osv) as total_views
from gold.user_daily_osv
group by 1
)
ORDER BY 2 DESC

虽然这工作正常，但执行起来需要很多时间，因为这些表很大，任何其他解决方法都会非常有用。

Answer 1

您可以尝试使用 sum window function 来计算总观看次数：

SELECT portfolio,
    (total_portfolio_views * 1.0 / sum(total_portfolio_views) over ()) * 100 view_contribution_perc
FROM(
        select portfolio,
            sum(portfolio_views) AS total_portfolio_views
        from gold.user_daily_osv
        group by 1
    )
ORDER BY 2 DESC

Presto SQL 查询以计算观看百分比

Presto SQL query to calcute percent views

sql

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