SQL-加入2个过滤和分组的时间序列

问题描述

我有2个要与Presto / AWS Athena一起运行的SQL查询，它们看起来像这样：

SELECT count(distinct id) as filtered_id,date_format(from_iso8601_timestamp(mydate),'%Y-%c') AS month_year
FROM table
WHERE value = 'bla'
GROUP BY  date_format(from_iso8601_timestamp(mydate),'%Y-%c')
ORDER BY  date_parse(month_year,'%Y-%c')

SELECT count(distinct id) as unfiltered_id,'%Y-%c') AS month_year
FROM table
GROUP BY  date_format(from_iso8601_timestamp(mydate),'%Y-%c')

我想将这些结果合并到一个表中，基本上是一个时间序列，其中各个日期有2个值。我希望filtered_id和unfiltered_id保持单独的列。我不确定如何实现此目的，我尝试加入同一张表，但我不知道如何仅针对1个系列进行过滤。

基本上，我想要这样的结果：

filtered_ids,unfiltered_ids,month_year
6,15,2020-06
10,10,2020-07
10,20,2020-08

解决方法

如果我理解正确，则需要条件聚合：

SELECT count(distinct case when value = 'bla' then id end) as filtered_id,count(distinct id) as filtered_id,date_format(from_iso8601_timestamp(mydate),'%Y-%c') AS month_year
FROM table
GROUP BY  date_format(from_iso8601_timestamp(mydate),'%Y-%c')
ORDER BY  date_parse(month_year,'%Y-%c');

presto sql sql