Between a MIN and MAX date in joined table - mysql

Question

I have a table called Booking and a table called FacilityBooking. A booking is a composition of facility bookings, a one to many relation. The date and time of the booking is determined by the lowest start date, and the highest end date of the facility bookings that belongs to it.
I want to pull some statistics of how many private and how many business bookings there has been between two dates.
CREATE TABLE `Booking` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`comments` varchar(255) DEFAULT NULL,
`createdBy` varchar(255) DEFAULT NULL,
`customerName` varchar(255) DEFAULT NULL,
`email` varchar(255) DEFAULT NULL,
`isPaid` bit(1) DEFAULT NULL,
`isPrivateClient` bit(1) DEFAULT NULL,
`needsPermission` bit(1) DEFAULT NULL,
`phoneNumber` varchar(255) DEFAULT NULL,
`referenceNumber` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
# Dump of table FacilityBooking
# ------------------------------------------------------------
CREATE TABLE `FacilityBooking` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`comments` varchar(2000) DEFAULT NULL,
`from` datetime DEFAULT NULL,
`to` datetime DEFAULT NULL,
`bookablePlace_id` int(11) DEFAULT NULL,
`booking_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `FK_2tv9w7g5vyx9po8vs6ceogldb` (`bookablePlace_id`),
KEY `FK_n17h188ecbdos5lsva51b8j29` (`booking_id`),
CONSTRAINT `FK_n17h188ecbdos5lsva51b8j29` FOREIGN KEY (`booking_id`) REFERENCES `Booking` (`id`),
CONSTRAINT `FK_2tv9w7g5vyx9po8vs6ceogldb` FOREIGN KEY (`bookablePlace_id`) REFERENCES `BookablePlace` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
I have created an sqlfiddle: http://sqlfiddle.com/#!9/7ae95/2
And this is what i have so far:
SELECT
CASE isPrivateClient
WHEN 0 THEN "business"
WHEN 1 THEN "private"
END AS clientType,
count(isPrivateClient) as count
FROM
Booking
GROUP BY
isPrivateClient
So what i need from here is to join the facilitybookings and search between the lowest from date and the highest to date.
Hope someone can help me :)

Answer 1

Join the FacilityBooking table and filter using WHERE:
SELECT
CASE isPrivateClient
WHEN 0 THEN "business"
WHEN 1 THEN "private"
END AS clientType,
count(FacilityBooking.id) as count
FROM
Booking INNER JOIN FacilityBooking ON
Booking.id = FacilityBooking.booking_id
-- Between 2015-05-01 AND 2015-06-01 INCLUSSIVE'
WHERE FacilityBooking.from <= '2015-06-01' AND FacilityBooking.to >= '2015-05-01'
GROUP BY
isPrivateClient
fixed fiddle

Answer 2

If you want to only include "full" Booking in which all FacilityBooking are between 2 date, something like this should do the trick :
SELECT clientType, count(bookId)
FROM (
SELECT
b.id as bookId,
CASE b.isPrivateClient
WHEN 0 THEN "business"
WHEN 1 THEN "private"
END AS clientType,
Min(fb.from) as minFrom,
Max(fb.to) as maxTo
FROM
Booking b
INNER JOIN FacilityBooking fb ON b.id = fb.booking_id
GROUP BY bookId
) tbl
WHERE minFrom >= '2015-05-22' -- Min Date
AND maxTo <= '2015-05-24' -- Max Date
GROUP BY
clientType