Как сравнить временной интервал в SQL Server?

Question

У меня есть таблица [pricelist]

startHour 
endHour 
Price 

, а другой таблицы, содержащей [actualuse]

startDate 
endDate 
user 

Мои данные

pricelist:

startHour | endHour | price 
---------------------------- 
00:00  | 07:59 | 10 
08:00  | 15:59 | 20 
16:00  | 23:59 | 5 

actualUse:

startDate  | endDate   | jobId 
------------------------------------------- 
12/10/2014 08:30 | 12/10/2014 15:20| 1 
12/10/2014 07:30 | 12/10/2014 18:20| 2 
12/10/2014 07:30 | 13/10/2014 16:20| 3 
12/10/2014 09:30 | 13/10/2014 00:20| 4 

Я пытаюсь получить за каждую гору все строки в прейскуранте, к которому принадлежат. Например, для 1 JobId я получить

startDate  | endDate   | jobId |price 
--------------------------------------------------- 
12/10/2014 08:30 | 12/10/2014 15:20| 1  |20 

для JobId 2

startDate  | endDate   | jobId |price 
--------------------------------------------------- 
12/10/2014 07:30 | 12/10/2014 07:59| 2  |10  
12/10/2014 08:00 | 12/10/2014 15:59| 2  |20 
12/10/2014 16:00 | 12/10/2014 18:20| 2  |5 

для JobId 3

startDate  | endDate   | jobId |price 
--------------------------------------------------- 
12/10/2014 07:30 | 12/10/2014 07:59| 3  |10 
12/10/2014 08:00 | 12/10/2014 15:59| 3  |20 
12/10/2014 16:00 | 12/10/2014 23:59| 3  |5 
13/10/2014 00:00 | 13/10/2014 07:59| 3  |10 
13/10/2014 08:00 | 13/10/2014 15:59| 3  |20 
13/10/2014 16:00 | 13/10/2014 16:20| 3  |5 

Answer 1

Вот возможный рабочий раствор. Я знаю, что курсор немного уродлив, но мне пришлось создать еще одну таблицу с каждой возможной датой между диапазонами дат. Вы могли бы реорганизовать некоторые даты вычисления тоже (я предположил, что вы работали с TIME типа данных)

/* 
create table pricelist 
(
    startHour time, 
    endHour time, 
    price decimal(18,2) 
) 

create table actualuse 
(
    startDate datetime, 
    endDate datetime, 
    jobId int 
) 

insert pricelist values 
('00:00','07:59',10), 
('08:00','15:59',20), 
('16:00','23:59',5) 

set dateformat dmy 
insert actualuse values 
('12/10/2014 08:30','12/10/2014 15:20',1), 
('12/10/2014 07:30','12/10/2014 18:20',2), 
('12/10/2014 07:30','13/10/2014 16:20',3), 
('12/10/2014 09:30','13/10/2014 00:20',4) 

*/ 

BEGIN TRY DROP TABLE #actualUseDays END TRY 
BEGIN CATCH END CATCH 

CREATE TABLE #actualUseDays (
    startDate DATETIME 
    ,endDate DATETIME 
    ,jobId INT 
    ) 

DECLARE @startDate DATETIME 
    ,@endDate DATETIME 
    ,@jobId INT; 

DECLARE cur CURSOR FORWARD_ONLY FOR SELECT * FROM actualuse 

OPEN cur; 

FETCH NEXT FROM cur INTO @startDate ,@endDate ,@jobId 

WHILE @@FETCH_STATUS = 0 
BEGIN 
    INSERT #actualUseDays 
    SELECT @startDate 
     ,iif(CAST(@endDate AS DATE) <> CAST(@startDate AS DATE), DATEADD(day, DATEDIFF(day, '19000101', cast(@startDate AS DATE)), CAST(CAST('23:59:59' AS TIME) AS 
        DATETIME2(7))), @endDate) 
     ,@jobId 

    UNION 

    SELECT CAST(DATEADD(DAY, number + 1, @startDate) AS DATE) [Date] 
     ,iif(CAST(@endDate AS DATE) <> CAST(DATEADD(DAY, number + 1, @startDate) AS DATE), DATEADD(day, DATEDIFF(day, '19000101', CAST(DATEADD(DAY, number + 1, 
          @startDate) AS DATE)), CAST(CAST('23:59:59' AS TIME) AS DATETIME2(7))), @endDate) 
     ,@jobId 
    FROM master..spt_values 
    WHERE type = 'P' 
     AND DATEADD(DAY, number + 1, CAST(@startDate AS DATE)) < @endDate 

    FETCH NEXT FROM cur INTO @startDate ,@endDate ,@jobId 
END 

CLOSE cur; 
DEALLOCATE cur; 

/* 
#actualUseDays now contains : 

startDate    endDate     jobId 
----------------------- ----------------------- ----------- 
2014-10-12 08:30:00.000 2014-10-12 15:20:00.000 1 
2014-10-12 07:30:00.000 2014-10-12 18:20:00.000 2 
2014-10-12 07:30:00.000 2014-10-12 23:59:59.000 3 
2014-10-13 00:00:00.000 2014-10-13 16:20:00.000 3 
2014-10-12 09:30:00.000 2014-10-12 23:59:59.000 4 
2014-10-13 00:00:00.000 2014-10-13 00:20:00.000 4 
*/ 

SELECT iif(CAST(a.startDate AS TIME) > p.startHour, startDate, DATEADD(day, DATEDIFF(day, '19000101', CAST(startDate AS DATE)), CAST(startHour AS DATETIME2(7)))) AS 
    startDate 
    ,iif(CAST(a.endDate AS TIME) < p.endHour, endDate, DATEADD(day, DATEDIFF(day, '19000101', CAST(endDate AS DATE)), CAST(endHour AS DATETIME2(7)))) AS endDate 
    ,jobId 
    ,price 
FROM #actualUseDays a 
INNER JOIN pricelist p 
    ON CAST(a.startDate AS TIME) <= p.endHour 
     AND CAST(a.endDate AS TIME) >= p.startHour 
ORDER BY jobId 
    ,iif(CAST(a.startDate AS TIME) > p.startHour, startDate, DATEADD(day, DATEDIFF(day, '19000101', CAST(startDate AS DATE)), CAST(startHour AS DATETIME2(7)))) 

Результаты:

startDate     endDate      jobId  price 
--------------------------- --------------------------- ----------- --------------------------------------- 
2014-10-12 08:30:00.0000000 2014-10-12 15:20:00.0000000 1   20.00 
2014-10-12 07:30:00.0000000 2014-10-12 07:59:00.0000000 2   10.00 
2014-10-12 08:00:00.0000000 2014-10-12 15:59:00.0000000 2   20.00 
2014-10-12 16:00:00.0000000 2014-10-12 18:20:00.0000000 2   5.00 
2014-10-12 07:30:00.0000000 2014-10-12 07:59:00.0000000 3   10.00 
2014-10-12 08:00:00.0000000 2014-10-12 15:59:00.0000000 3   20.00 
2014-10-12 16:00:00.0000000 2014-10-12 23:59:00.0000000 3   5.00 
2014-10-13 00:00:00.0000000 2014-10-13 07:59:00.0000000 3   10.00 
2014-10-13 08:00:00.0000000 2014-10-13 15:59:00.0000000 3   20.00 
2014-10-13 16:00:00.0000000 2014-10-13 16:20:00.0000000 3   5.00 
2014-10-12 09:30:00.0000000 2014-10-12 15:59:00.0000000 4   20.00 
2014-10-12 16:00:00.0000000 2014-10-12 23:59:00.0000000 4   5.00 
2014-10-13 00:00:00.0000000 2014-10-13 00:20:00.0000000 4   10.00