SQL dotazy 00904. 00000 - %s:neplatný identifikátor

Měli byste zkusit malá písmena pro identifikátory tabulky/sloupce (jako v from /inner join klauzule):

SELECT  entertainer_id,
        entertainer_groupname
FROM    casestudy_entertainer
INNER JOIN casestudy_availability ON casestudy_entertainer.entertainer_id = casestudy_availability.availability_entertainerid
INNER JOIN casestudy_calendardates ON casestudy_availability.availibility_calendardateid = casestudy_calendardates.calendar_id
WHERE entertainer_type = '&Entertainer_TYPE'
  AND casestudy_calendardates.calendar_date = '&Event_date'