Hi. I decided to tidy up some of my queries, but I came across something
that stumpt me:
mysql> SELECT
-> jobs.jobId,
-> jobs.active,
-> jobs.title,
-> jobs.listed,
-> industries.indu stry,
-> occupations.occ upation,
-> agencies.agency Id,
-> agencies.agency ,
-> contacts.contac tId,
-> contacts.firstN ame,
-> contacts.lastNa me
-> FROM
-> jobs
-> LEFT JOIN industries ON jobs.industryId = industries.indu stryId
-> LEFT JOIN occupations ON jobs.occupation Id =
occupations.occ upationId
-> LEFT JOIN agencies ON jobs.agencyId = agencies.agency Id
-> LEFT JOIN contacts ON jobs.contactId = contacts.contac tId;
Runs fine
mysql> SELECT
-> jobs.jobId,
-> jobs.active,
-> jobs.title,
-> jobs.listed,
-> industries.indu stry,
-> occupations.occ upation,
-> agencies.agency Id,
-> agencies.agency ,
-> contacts.contac tId,
-> contacts.firstN ame,
-> contacts.lastNa me
-> FROM
-> jobs
-> LEFT JOIN industries USING (industryId)
-> LEFT JOIN occupations USING (occupationId)
-> LEFT JOIN agencies USING (agencyId)
-> LEFT JOIN contacts USING (contactId);
ERROR 1054: Unknown column 'industries.occ upationId' in 'on clause'
Aren't these essentially the same statements? Or does "USING" not work the
way I think it does?
Thanks, Justin.
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