查看日期范围的房间可用性

Question

Hello i have 2 tables rooms and bookings but my table sturcture little bit different, in bookings table there are roomid,date,status for example:

101,2012-12-10,0
101,2012-12-11,0
101,2012-12-12,1
101,2012-12-13,0
102,2012-12-10,0
102,2012-12-11,0
102,2012-12-12,0

and i would like to find available rooms between 2012-12-10 and 2012-12-13 according this request only room 102 should be return.

i've tried

SELECT id 
FROM status 
WHERE status='0' 
  AND date between '2012-12-10' AND '2012-12-13' 
GROUP BY id

it doesn't work because even find only one available row it returns true for 101

so 101 is available for 2012-12-11 then showing like available but not okay for our data range.

Answer 1

If the date has a time associated with it you need to do something like this:

SELECT id 
FROM status 
WHERE status='0' 
  AND date between '2012-12-10 00:00:00' AND '2012-12-13 23:59:59' 
GROUP BY id

You can also use Date(date) instead of including times, but this might be less efficient.

Answer 2

You should be able to use the following:

SELECT roomid 
FROM status s1
WHERE status='0' 
  AND date between '2012-12-10' AND '2012-12-13' 
  and not exists (select roomid
                  from status  s2
                  where status='1' 
                    AND date between '2012-12-10' AND '2012-12-13'
                    and s1.roomid = s2.roomid)
GROUP BY roomid

See SQL Fiddle with demo

Answer 3

Try this:

SELECT rd.* 
FROM room_details rd 
INNER JOIN (SELECT DISTINCT roomid FROM bookings 
            WHERE roomid NOT IN (SELECT roomid FROM bookings 
                                WHERE STATUS =0 AND DATE BETWEEN '2012-12-10' AND '2012-12-13')
                ) AS a ON rd.roomid = a.roomid

Answer 4

This will select all rooms that have no row with status=1 in the interval you select. Notice that I am not using between : if status=1 on 13th of December, the room is still available in the interval, that's why I'm using >= and < :

SELECT roomid
FROM status
WHERE `date` >= '2012-12-10'
      AND `date` < '2012-12-13'
GROUP BY roomid
HAVING sum(status.status=1)=0

If there could also be some missing days in your table, and if that means that the room is not booked but also not available, you could also use this query:

SELECT roomid
FROM status
WHERE `date` >= '2012-12-10'
      AND `date` < '2012-12-13'
      AND status=0
GROUP BY roomid
HAVING count(*)=DATEDIFF('2012-12-13', '2012-12-10')

that checks that the number of days in the interval is equal to the number of rows with status=0.

Answer 5

The SQL BETWEEN condition will return the records where expression is within the range of value1 and value2 (inclusive). So row 101,2012-12-10,0 should be returned for above mentioned query.

Answer 6

Try this:

SELECT roomid
FROM status
WHERE 'date_from' <= "2012-12-10"  AND 'date_to' > "2012-12-10" AND 'status'= 0;