Question

Good day guys,
I don’t know… why does not this query works:

      SELECT article.topic, article.ID, 
      (
      SELECT COUNT(*) FROM comment
      WHERE article.ID_art = comment.foreign_ID_art
      GROUP BY foreign_ID_art
      ) 
      AS mycount

      FROM article
      WHERE article.mycount = '0'

Answer 1

SELECT article.topic, article.ID, 
  (
  SELECT COUNT(*) FROM comment
  WHERE article.ID_art = comment.foreign_ID_art
  GROUP BY foreign_ID_art
  ) 
  AS mycount

FROM article
HAVING mycount = '0'