code: function objToEquals(obj) {
      var expressions = [];
      for (var col in obj) {
        expressions.push(sql.equal(col, obj[col]));
      }
      return expressions;
    }
docs: raw objects default to equals {first_name: 'Fred', last_name = 'Flintstone'} -> [equals('first_name', 'Fred'), equals('last_name', 'Flintstone')]