Sql 有自定义的年份，而不是日历年

我希望这一年从八月开始，在接下来的七月结束。除了写我每年都要写的丑陋的

IFELSE

语句之外，还有什么简单的方法可以做到这一点吗？理想情况下，我希望有像2009-10、2010-11等这样的一年。我使用的是

Postgres

下面是一个示例查询，我想通过它来获取自定义年份

Select extract(year from created) as Year, type, count(*) 
from table
group by Year, type
order by Year

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如果有任何帮助，我们将不胜感激，TIA。

考虑建立一个日期表。使用此日期表，您可以将各种数据与每个日期关联，例如会计年度、季度、月份、假日、周末等。

考虑设置日期表。使用此日期表，您可以将各种数据与每个日期关联，例如会计年度、季度、月份、假日、周末等

SELECT (CASE WHEN (EXTRACT(month FROM created) > 6) THEN CAST(EXTRACT(year FROM created) AS text) || '-' || CAST(EXTRACT(year FROM created) +1 AS text) ELSE (CAST(EXTRACT(year FROM created) - 1 AS text) || '-' || CAST(EXTRACT(year FROM created) AS text)) END) AS CustomYear
FROM asmt.testscores order by created desc LIMIT 10000

这似乎成功了

select
    extract(year from created + interval '6 months') as "Year",
    type,
    count(*) 
from table
group by 1, 2
order by 1

这似乎成功了

select
    extract(year from created + interval '6 months') as "Year",
    type,
    count(*) 
from table
group by 1, 2
order by 1