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Database Design for hotel management system

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it's a good tutorial but how can I get the available room?

I tried to follow your logic but it's not work

This is my sql query from laravel

	$load_room = DB::table('tb_reservation_room')
	->rightJoin('tb_rooms', 'tb_rooms.id', '=', 'tb_reservation_room.room_id')
	->select('tb_rooms.id', 'tb_rooms.room_name')

Screen Shot 2022-02-12 at 15.23.47.png

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first I tried this code will show all rooms in system

	select `tb_rooms`.`id`, `tb_rooms`.`room_name` from `tb_reservation_room` right join `tb_rooms` on `tb_rooms`.`id` = `tb_reservation_room`.`room_id`

I tried this code but no any output

	select `tb_rooms`.`id`, `tb_rooms`.`room_name` from `tb_reservation_room` right join `tb_rooms` on `tb_rooms`.`id` = `tb_reservation_room`.`room_id` where `checkin_date` < '2022-02-12'

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