[英]Count the number of minutes with datediff and substring
我有這樣的數據
availabilities
[{"starts_at":"09:00","ends_at":"17:00"}]
我在下面有查詢,它有效
select COALESCE(availabilities,'Total') as availabilities,
SUM(DATEDIFF(minute,start_at,end_at)) as 'Total Available Hours in Minutes'
from (
select cast(availabilities as NVARCHAR) as availabilities,
cast(SUBSTRING(availabilities,16,5) as time) as start_at,
cast(SUBSTRING(availabilities,34,5) as time) as end_at
from alfy.dbo.daily_availabilities
)x
GROUP by ROLLUP(availabilities);
結果
availabilities Total Available Hours in Minutes
[{"starts_at":"09:00","ends_at":"17:00"}] 480
如果數據如下所示
availabilities
[{"starts_at":"10:00","ends_at":"13:30"},{"starts_at":"14:00","ends_at":"18:00"}]
[{"starts_at":"09:00","ends_at":"12:30"},{"starts_at":"13:00","ends_at":"15:30"},{"starts_at":"16:00","ends_at":"18:00"}]
如何計算兩個或多個時間范圍內的分鍾數?
由於您有 JSON 數據使用OPENJSON (Transact-SQL)來解析它,例如:
create table dbo.daily_availabilities (
id int,
availabilities nvarchar(max) --JSON
);
insert dbo.daily_availabilities (id, availabilities) values
(1, N'[{"starts_at":"09:00","ends_at":"17:00"}]'),
(2, N'[{"starts_at":"10:00","ends_at":"13:30"},{"starts_at":"14:00","ends_at":"18:00"}]'),
(3, N'[{"starts_at":"09:00","ends_at":"12:30"},{"starts_at":"13:00","ends_at":"15:30"},{"starts_at":"16:00","ends_at":"18:00"}]');
select id, sum(datediff(mi, starts_at, ends_at)) as total_minutes
from dbo.daily_availabilities
cross apply openjson(availabilities) with (
starts_at time,
ends_at time
) av
group by id
ID | 總分鍾數 |
---|---|
1 | 480 |
2 | 450 |
3 | 480 |
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