sql-fiddle.rb

['mysql2', 'sequel', 'pp'].each(&method(:require))
DB = Sequel.connect('mysql2://root@localhost/tmp')
DB.tables.each {|t| DB.drop_table(t) }

def t(name, columns, *rows)
  DB.create_table(name) do
    columns.each.with_index do |column, ind|
      type = rows[0][ind].class.to_s
      send type, column
    end
  end
  rows.each do |row|
    DB[name].insert(Hash[columns.zip(row)])
  end
end

def q(query)
  pp DB[query].to_a
end

# Create table & populate
t :users,
  [:id, :name],
  [42,  'Bob']

# Print query result
q 'SELECT * FROM users'

# When ready to share paste to http://sqlfiddle.com/
# mysqldump --compact tmp | grep -v '^/' | grep -v 'LOCK'