sql - 如何在sql中显示数据月基？

Question

我有这个查询：

declare @startdate datetime='1/1/2012', @endate datetime='12/31/2012'
select * from hours1
where date_start between @startdate and @enddate

我想显示如下数据：

Jan
feb
March
...
December

可以请帮助我如何得到这个？

Answer 1

我假设您想显示开始日期和结束日期之间的月份。

declare @startdate datetime='1/1/2012', 
        @endate datetime='12/31/2012'

SELECT
    DATENAME(month, date_start) 
FROM
    hours1
WHERE
    date_start between @startdate and @enddate
GROUP BY 
    DATENAME(month, date_start), 
    DATEPART(month, date_start)
ORDER BY
    DATEPART(month, date_start)

Answer 2

如果要按月汇总数据，请使用日期函数：

select count(<count_grouped_items), sum(<sum_of_grouped_items>), ...

from hours1 
where date_start between @startdate and @enddate 
group by YEAR(date_start), MONTH(date_start) 
order by YEAR(date_start) asc, MONTH(date_starts) asc