如何在 presto SQL 中按月分组

Question

我正尝试在 Presto SQL 中按月分组。我试过这个：

select
    date_trunc('month', CAST(date AS date)) date_month,
    sum(gross_revenue,0) AS 'monthly_net_revenue'
    from gross_revenue_calculator
    group by date_trunc('month', date)

这给了我以下错误： Malformed query: line 61:27: mismatched input ''monthly_net_revenue''. Expecting: <identifier>

预期输出：

October:  2.12
November: .12

Answer 1

你不应该使用单引号作为列名，它要么没有引号要么是双引号，你也可以在 GROUP BY 中按索引引用列，就像在 WITH 子句中一样：

select
    date_trunc('month', CAST(date AS date)) date_month,
    sum(gross_revenue,0) AS monthly_net_revenue
from gross_revenue_calculator
group by 1

如何在 presto SQL 中按月分组

How to group by month in presto SQL

sql

postgresql

presto