genmai.go
func (db *DB) OrderBy(table interface{}, column interface{}, order ...interface{}) *Condition {
	return newCondition(db).OrderBy(table, column, order...)
}
func (db *DB) OrderBy(table interface{}, column interface{}, order ...interface{}) *Condition {
	return newCondition(db).OrderBy(table, column, order...)
}
// OrderBy returns a new Condition of "ORDER BY" clause.