Mysql - Operand should contain 1 column(s) : What's wrong with the query...?
- by SpikETidE
Hi everybody....
I am trying to query a database to find the following
If a customer searches for a hotel in a city between dates A and B, find and return the hotels in which rooms are free between the two dates.
There will be more than one room in each room type(i.e. 5 Rooms in type A, 10 rooms in Type B etc) and we have to query the db to find only those hotels in which there is atleast one room free in atleast one type.
This is my table structure....
**Structure for table 'reservations'**
reservation_id
hotel_id
room_id
customer_id
payment_id
no_of_rooms
check_in_date
check_out_date
reservation_date
**Structure for table 'hotels'**
hotel_id
hotel_name
hotel_description
hotel_address
hotel_location
hotel_country
hotel_city
hotel_type
hotel_stars
hotel_image
hotel_deleted
**Structure for table 'rooms'**
room_id
hotel_id
room_name
max_persons
total_rooms
room_price
room_image
agent_commision
room_facilities
service_tax
vat
city_tax
room_description
room_deleted
And this is my query
$city_search = '15';
$check_in_date = '29-03-2010';
$check_out_date = '31-03-2010';
$dateFormat_check_in = "DATE_FORMAT('$reservations.check_in_date','%d-%m-%Y')";
$dateFormat_check_out = "DATE_FORMAT('$reservations.check_out_date','%d-%m-%Y')";
$dateCheck = "$dateFormat_check_in >= '$check_in_date' AND $dateFormat_check_out <= '$check_out_date'";
$query = "SELECT $rooms.room_id,
$rooms.room_name,
$rooms.max_persons,
$rooms.room_price,
$hotels.hotel_id,
$hotels.hotel_name,
$hotels.hotel_stars,
$hotels.hotel_type
FROM $hotels,$rooms,$reservations
WHERE $hotels.hotel_city = '$city_search'
AND $hotels.hotel_id = $rooms.hotel_id
AND $hotels.hotel_deleted = '0'
AND $rooms.room_deleted = '0'
AND $rooms.total_rooms - (SELECT SUM($reservations.no_of_rooms) as tot,
$rooms.room_id as id
FROM $reservations,$rooms
WHERE $dateCheck
GROUP BY $reservations.room_id) > '0'";
The number of rooms already reserved in each room type in each hotel will be stored in the reservations table...
The query returns the error :
Operand should contain 1 column(s)
I tried running the sub-query alone but i don't get any result... And i have lost quite some amount of hair trying to de-bug this query from yesterday... What's wrong with this...? Or is there a better way to do what i mentioned above...?
Thanks for your time...
