# File lib/aws/simple_db/item_collection.rb, line 525
      def select_expression options = {}
        expression = []
        expression << "SELECT #{options[:output_list] || self.output_list}"
        expression << "FROM `#{domain.name}`"
        expression << where_clause
        expression << order_by_clause
        expression << limit_clause
        expression.compact.join(' ')
      end