我有一个非常简单的要求,但我很难找到解决方法。
我有一个非常简单的查询:
SELECT
ServiceCode,
StartDate,
Available,
Nights,
BookingID
FROM @tmpAvailability
LEFT JOIN vwRSBooking B
ON B.Depart = A.StartDate
AND B.ServiceCode = A.SupplierCode
AND B.StatusID IN (2640, 2621)
ORDER BY StartDate;
由2张桌子组成 @tmpAvailability由以下字段组成:
vwRSBooking,包含以下字段
离开和开始日期可以加入第一天的链接,并且可以加入服务代码和供应商代码,以确保可用性链接到同一供应商。
产生如下输出:
Code | Dates | Available | Nights | BookingID
TEST | 2018-01-04 | 1 | NULL | NULL
TEST | 2018-01-05 | 1 | NULL | NULL
TEST | 2018-01-06 | 0 | 4 | 123456
TEST | 2018-01-07 | 0 | NULL | NULL
TEST | 2018-01-08 | 0 | NULL | NULL
TEST | 2018-01-09 | 0 | NULL | NULL
TEST | 2018-01-10 | 1 | NULL | NULL
TEST | 2018-01-11 | 1 | NULL | NULL
TEST | 2018-01-12 | 1 | NULL | NULL
TEST | 2018-01-13 | 0 | NULL | 234567
TEST | 2018-01-14 | 0 | NULL | NULL
TEST | 2018-01-15 | 0 | NULL | NULL
我需要的是,当BookingID在4天内预订ID和夜晚分布在那些日子时,例如:
Code | Dates | Available | Nights | BookingID
TEST | 2018-01-04 | 1 | NULL | NULL
TEST | 2018-01-05 | 1 | NULL | NULL
TEST | 2018-01-06 | 0 | 4 | 123456
TEST | 2018-01-07 | 0 | 4 | 123456
TEST | 2018-01-08 | 0 | 4 | 123456
TEST | 2018-01-09 | 0 | 4 | 123456
TEST | 2018-01-10 | 1 | NULL | NULL
TEST | 2018-01-11 | 1 | NULL | NULL
TEST | 2018-01-12 | 1 | NULL | NULL
TEST | 2018-01-13 | 0 | 3 | 234567
TEST | 2018-01-14 | 0 | 3 | 234567
TEST | 2018-01-15 | 0 | 3 | 234567
TEST | 2018-01-16 | 1 | NULL | NULL
如果有人对如何解决这个问题有任何想法,那将非常感激。
安德鲁
答案 0 :(得分:1)
您需要一张日历表,其中包含您日期可能属于的日期范围内的所有日期。对于这个例子,我在2018年1月构建了一个。然后我们可以加入这个表来创建额外的行。
以下是我使用的示例代码。你可以在SQL Fiddle看到它。
CREATE TABLE code (
code varchar(max),
dates date,
available int,
nights int,
bookingid int
)
INSERT INTO code VALUES
('TEST','2018-01-04','1',NULL,NULL),
('TEST','2018-01-05','1',NULL,NULL),
('TEST','2018-01-06','0',4,123456),
('TEST','2018-01-07','0',NULL,NULL),
('TEST','2018-01-08','0',NULL,NULL),
('TEST','2018-01-09','0',NULL,NULL),
('TEST','2018-01-10','1',NULL,NULL),
('TEST','2018-01-11','1',NULL,NULL),
('TEST','2018-01-12','1',NULL,NULL),
('TEST','2018-01-13','0',3,234567),
('TEST','2018-01-14','0',NULL,NULL),
('TEST','2018-01-15','0',NULL,NULL)
CREATE TABLE dates (
dates date
)
INSERT INTO dates VALUES
('2018-01-01'),('2018-01-02'),('2018-01-03'),('2018-01-04'),('2018-01-05'),('2018-01-06'),('2018-01-07'),('2018-01-08'),('2018-01-09'),('2018-01-10'),('2018-01-11'),('2018-01-12'),('2018-01-13'),('2018-01-14'),('2018-01-15'),('2018-01-16'),('2018-01-17'),('2018-01-18'),('2018-01-19'),('2018-01-20'),('2018-01-21'),('2018-01-22'),('2018-01-23'),('2018-01-24'),('2018-01-25'),('2018-01-26'),('2018-01-27'),('2018-01-28'),('2018-01-29'),('2018-01-30'),('2018-01-31')
以下是基于此数据集的查询:
SELECT
code.code,
dates.dates,
code.available,
code.nights,
code.bookingid
FROM code
LEFT JOIN dates ON
dates.dates >= code.dates
AND dates.dates < DATEADD(DAY,nights,code.dates)
编辑:这是一个使用您的初始查询作为子查询的示例,如果您想要一个副本和一个副本,将结果集加入日期表。糊。仍然需要创建日期表。
SELECT
ServiceCode,
StartDate,
Available,
Nights,
BookingID
FROM (
SELECT
ServiceCode,
StartDate,
Available,
Nights,
BookingID
FROM @tmpAvailability
LEFT JOIN vwRSBooking B
ON B.Depart = A.StartDate
AND B.ServiceCode = A.SupplierCode
AND B.StatusID IN (2640, 2621)
) code
LEFT JOIN dates ON
dates.dates >= code.dates
AND dates.dates < DATEADD(DAY,nights,code.dates)
ORDER BY StartDate;
答案 1 :(得分:1)
您可以将vwRSBooking
替换为使用CTE的其他视图,以获取预订涵盖的所有日期。然后使用视图的coverdate
加入@tmpAvailability
表:
CREATE VIEW vwRSBookingFull
AS
WITH cte ( bookingid, nights, depart, code, coverdate)
AS (SELECT bookingid,
nights,
depart,
code,
depart
FROM vwRSBooking
UNION ALL
SELECT c.bookingid,
c.nights,
c.depart,
c.code,
DATEADD(d, 1, c.coverdate)
FROM cte c
WHERE DATEDIFF(d, c.depart, c.coverdate) < (c.nights - 1))
SELECT c.bookingid,
c.nights,
c.depart,
c.code,
c.coverdate
FROM cte c
GO