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Slick으로 일부 SQL 쿼리를 작성합니다. 몇 가지 중첩 된 쿼리를 사용하여이 쿼리가 있고이 모든 것을 하나로 결합하는 방법을 알 수 없습니다.집계 함수가있는 중첩 쿼리 Slick
내 SQL 쿼리 :
select count(*) from (
select TOP 1 WITH TIES sum(c) cc, c1, c2 from (
SELECT count(*) c, town_from c1, town_to c2 from trip
where town_from>=town_to
group by town_from, town_to
union all
SELECT count(*) c,town_to, town_from from trip
where town_to>town_from
group by town_from, town_to
) as t
group by c1,c2
order by cc desc
) as tt
슬릭이 질의 내 미완성 버전 :
val subquery1 = TripTable.table.filter(t => t.townFrom >= t.townTo)
.groupBy(t => (t.townFrom, t.townTo))
.map{ case ((townFrom, townTo), group) => (group.length ,townFrom, townTo)}
val subquery2 = TripTable.table.filter(t => t.townTo > t.townFrom)
.groupBy(t => (t.townFrom, t.townTo))
.map{ case ((townFrom, townTo), group) => (group.length ,townFrom, townTo)}
val t = subquery1 union subquery2
val tt = t.map{ case subquery1 => (subquery1._1, subquery1._2, subquery1._3) }
.groupBy{case (sub1, sub2, sub3) => (sub2, sub3)}
.map{ case ((sub1,sub2, sub3), group) => (group.map(_._1).sum.get, sub2, sub3)}
.sortBy{ case (sum, sub2, sub3) => sum}
.take(1)
db.run(tt.length.result)
내가 도움이 모든 종류의 매우 감사하게 될 것입니다!