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ernest-ns/find_duplicate.rb

Created March 3, 2016 12:53
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Rails Script to find Duplicate entries in the DB
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find_duplicate.rb
User.select(:first,:email).group(:first,:email).having("count(*) > 1").count
#{[nil, nil]=>512,
# ["Joe", "test@test.com"]=>23,
# ["Jim", "email2@gmail.com"]=>36,
# ["John", "email3@gmail.com"]=>21}
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