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[lukezz]

Sintetizzando tutto:

SELECT hot.*, sconto FROM hotels AS hot


LEFT JOIN (SELECT cam.hotel_id, cam.id_camera AS roomy, IFNULL(p.promo_sconto, 0) AS sconto FROM camere AS cam 
           
LEFT JOIN (SELECT promo_id, promo_sconto FROM promo WHERE promo_dal >= '2015-06-25' AND promo_al <= '2015-06-26' AND numero_ospiti = '1') AS p ON p.id_camera = cam.id_camera) AS rom ON hot.hotel_id = rom.hotel_id


WHERE hot.hotel_city = 'Adrano' AND disponibles >= '1'

mi da il seguente errore:

#1054 - Unknown column 'p.id_camera' in 'on clause', non capisco perchè

[MySQL]

Sintetizzando tutto:

SELECT hot.*, sconto FROM hotels AS hot


LEFT JOIN (SELECT cam.hotel_id, cam.id_camera AS roomy, IFNULL(p.promo_sconto, 0) AS sconto FROM camere AS cam 
           
LEFT JOIN (SELECT promo_id, promo_sconto FROM promo WHERE promo_dal >= '2015-06-25' AND promo_al <= '2015-06-26' AND numero_ospiti = '1') AS p ON p.id_camera = cam.id_camera) AS rom ON hot.hotel_id = rom.hotel_id


WHERE hot.hotel_city = 'Adrano' AND disponibles >= '1'

mi da il seguente errore:

#1054 - Unknown column 'p.id_camera' in 'on clause', non capisco perchè

Forse perchè non c'è nell'elenco della SELECT?
Ma soprattutto perchè LEFT JOIN sulla select?