Question

如果日期和时间字段的日期条目类似于＆＃39; 2017-12-04 21：30：00.000＆＃39;和持续时间是＆＃39; 1800＆＃39;和＆＃39; 2017-12-04 21：30：22.000＆＃39;已经＆＃39; 22＆＃39;然后我们的查询应显示记录为＆＃39; 2017-12-04 21：30：00.000＆＃39;作为＆＃39; 1800＆＃39;但是应该在2017-12-04 21：30：00.000＆＃39;但我的查询显示于2017-12-04 21：00：00.000，持续时间为＆＃39; 1822＆＃39; （总和1800 + 22）。我有这个问题link以不同的方式，但没有得到正确的答案因此在这里提出这个问题，因为我无法以适当的方式进行修改。

查询：

SELECT Interval=(CASE WHEN datepart(MINUTE,[DateTime]) = 0 and datepart(SECOND,DateTime)=0 THEN
CAST(CONVERT(VARCHAR(30),DATEADD(HOUR,-1,[DateTime]),101) + ' '+ cast(format(DATEPART(HOUR,DATEADD(HOUR,-1,[DateTime])),'0#') as varchar)+':30:00' as DateTime)
ELSE (CAST(CONVERT(VARCHAR(30),[DateTime],101) +' ' + (case when datepart(MINUTE,[DateTime])<=30  and 
 datepart(SECOND,[DateTime])<59
then cast(format(DATEPART(HOUR,[DateTime]),'0#') as varchar)+':00:00'
       else cast(format(DATEPART(HOUR,[DateTime]),'0#') as varchar)+':30:00' end) as DateTime)) END),   
      ID,Code,Duration=SUM(Duration) FROM Table
      WHERE [DateTime]  >= '2017-12-04 00:00:00'  and [DateTime] <= '2017-12-04 23:59:59' 

      GROUP BY (CASE WHEN datepart(MINUTE,[DateTime]) = 0 and datepart(SECOND,DateTime)=0 THEN
CAST(CONVERT(VARCHAR(30),DATEADD(HOUR,-1,[DateTime]),101) + ' '+ cast(format(DATEPART(HOUR,DATEADD(HOUR,-1,[DateTime])),'0#') as varchar)+':30:00' as DateTime)
ELSE (CAST(CONVERT(VARCHAR(30),[DateTime],101) +' ' + (case when datepart(MINUTE,[DateTime])<=30 and 
datepart(SECOND,[DateTime])<59  then cast(format(DATEPART(HOUR,[DateTime]),'0#') as varchar)+':00:00'
       else cast(format(DATEPART(HOUR,[DateTime]),'0#') as varchar)+':30:00' end) as DateTime)) END),

      ID,Code
      Order by Interval

实际表格数据。

DateTime             ID  Code    Duration
2017-12-12 00:30:00  1   12      1800
2017-12-12 00:30:37  1   12      37
2017-12-12 01:00:00  1   12      1793
2017-12-12 01:30:00  1   12      1800
2017-12-12 01:30:59  1   12      59

如果我运行查询，则预期结果是，

DateTime             ID  Code    Duration
2017-12-12 00:00:00  1   12      1837
2017-12-12 00:30:00  1   12      1800
2017-12-12 01:00:00  1   12      1800
2017-12-12 01:30:00  1   12      59

DateTime             ID  Code    Duration
2017-12-12 00:00:00  1   12      1800
2017-12-12 00:30:00  1   12      1800
2017-12-12 01:00:00  1   12      1800
2017-12-12 01:30:00  1   12      59

Answer 1

You can use date functions to round [DateTime] into 30 minute intervals, but the result does not match your expected result, which appears to be wrong

DateTime             ID  Code    Duration
2017-12-12 00:30:00  1   12      1800      1800 + 337 = 1837    2017-12-12 00:30
2017-12-12 00:30:37  1   12      37

2017-12-12 01:00:00  1   12      1793                   1793    2017-12-12 01:00

2017-12-12 01:30:00  1   12      1800      1800 +  59 = 1859    2017-12-12 01:30       
2017-12-12 01:30:59  1   12      59

SQL Fiddle

MS SQL Server 2014 Schema Setup:

CREATE TABLE Table1
    ([DateTime] datetime, [ID] int, [Code] int, [Duration] int)
;

INSERT INTO Table1
    ([DateTime], [ID], [Code], [Duration])
VALUES
    ('2017-12-12 00:30:00', 1, 12, 1800),
    ('2017-12-12 00:30:37', 1, 12, 37),
    ('2017-12-12 01:00:00', 1, 12, 1793),
    ('2017-12-12 01:30:00', 1, 12, 1800),
    ('2017-12-12 01:30:59', 1, 12, 59)
;

Query 1:

select
    dateadd(minute, (datediff(minute, [DateTime], 0) / 30)  * 30, 0)
  , sum(duration)
from table1
group by
    dateadd(minute, (datediff(minute, [DateTime], 0) / 30)  * 30, 0)

Results:

|                      |      |
|----------------------|------|
| 1782-01-19T22:30:00Z | 1859 |
| 1782-01-19T23:00:00Z | 1793 |
| 1782-01-19T23:30:00Z | 1837 |

日期和时间字段查询

1 个答案: