type UserQuery struct {
	PageQuery
	//...

	ScoreLtAvg *UserQuery `subquery:"select avg(score) from User"`
	ScoreLtAny *UserQuery `subquery:"SELECT score FROM User"`
	ScoreLtAll *UserQuery `subquery:"select score from UserEntity"`

	ScoreGtAvg *UserQuery `select:"avg(score)" from:"UserEntity"`

	ScoreInScoreOfUser    *UserQuery
	ScoreGtAvgScoreOfUser *UserQuery
}