record.go
func (r Record) Get(column string) (interface{}, error) {
	v, ok := r[column]
	if !ok {
		return nil, ErrUnknownColumn
	}

	return v, nil
}
func (r Record) Get(column string) (interface{}, error) {
	v, ok := r[column]
	if !ok {
		return nil, ErrUnknownColumn
	}

	return v, nil
}
// Get returns an interface value for a specific column.