First at all, i`m spanish so please, apologize for my english
Hello to everybody, i`m a newby with mysql and i have a problem with a select
I`m making a database for a hostel
I have 2 tables for reservations, one is called rooms and have 2 fields (id_room, tipo)and the other one is ocupation with 3 colums(id_reservation, date and id_room)
I`m using innodb database
I insert a register on the ocupation table for each day of the reservations, with the id_room and the id_reservation
I wanna mean, if u make a reservation for the 22-3-2007 to 24-3-2007 i will do that

rooms table
id_reservation date id_room
0001 2007-03-22 101
0001 2007-03-23 101
0001 2007-03-24 101

I know must there are a lot of better ways to do it, but i think is the simplest one
Now, my problem with the query is when i need to know for a especific date, witch rooms are avaliable
I wanna mean, if i try to check for the 22-03-2007 the query must return me all the rooms except the 101
Using SQL i can do it with a minus sentence, but the mysql version i`m using(5.0.24a) cant support it
Have anyone any idea?
Thanks, and please, forgive my english

I'm spanish speaker too .. but I write it in english for everyone can read
it.

The version 5 implements subqueries. You can do something like:

SELECT id_room
FROM rooms
WHERE id_room NOT IN (SELECT id_room FROM reservations WHERE date =
'22-03-07');

Regards,

RAUL DUQUE
Bogotá, Colombia

----- Original Message -----
From: "Yo Mismo" <d_alonso1@teleline.es>
To: <mysql@lists.mysql.com>
Sent: Monday, February 26, 2007 8:41 AM
Subject: problems with a select


First at all, i`m spanish so please, apologize for my english
Hello to everybody, i`m a newby with mysql and i have a problem with a
select
I`m making a database for a hostel
I have 2 tables for reservations, one is called rooms and have 2 fields
(id_room, tipo)and the other one is ocupation with 3 colums(id_reservation,
date and id_room)
I`m using innodb database
I insert a register on the ocupation table for each day of the reservations,
with the id_room and the id_reservation
I wanna mean, if u make a reservation for the 22-3-2007 to 24-3-2007 i will
do that

rooms table
id_reservation date id_room
0001 2007-03-22 101
0001 2007-03-23 101
0001 2007-03-24 101

I know must there are a lot of better ways to do it, but i think is the
simplest one
Now, my problem with the query is when i need to know for a especific date,
witch rooms are avaliable
I wanna mean, if i try to check for the 22-03-2007 the query must return me
all the rooms except the 101
Using SQL i can do it with a minus sentence, but the mysql version i`m
using(5.0.24a) cant support it
Have anyone any idea?
Thanks, and please, forgive my english