Error in query: SELECT *
FROM authors, content, languages, publishers, topics, translations, volunteers 
WHERE
  content.author_id = authors.author_id and
  content.topic_id = topics.topic_id and
  content.pub_id = publishers.pub_id and 
  translations.content_id = content.content_id and
  translations.translator_id = volunteers.vol_id and
  translations.lang_code = 'de' and
  translations.trans_uploadstatus = 'Uploaded' and
  translations.trans_title != '' and
  translations.trans_url != '' and
  languages.lang_code = translations.lang_code
  and LOWER(CONVERT(authors.author_displayname USING latin1)) = ''   
;.