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maclover7/gist:4d0348f2df88353b4abc

Created July 6, 2015 20:54
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gistfile1.txt
# Lesson.joins(:contents).where("contents.curriculum_id" = ?", "3280")
SELECT curriculum_id FROM Contents
WHERE curriculum_id IN
(SELECT curriculum_id FROM Contents
GROUP BY curriculum_id HAVING COUNT (curriculum_id) >1)
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