SQL（Oracle）选择最常见的值（多个表）

Question

我想知道哪个座位是个别大厅最畅销的？

订票

IDTICKET   MOVIE_IDMOVIE     HALL_IDHALL      PRICE     SEAT    ROW
1           10               2                4         10      6
2           5                2                4         10      5
3           5                2                4         10      4
4           8                5                4         3       1
5           7                5                4         4       15
6           10               7                4         7       9
7           6                2                4         14      3

HALLS

IDHALL      PLACE_IDPLACE    NAME           NUMSEATS      EQUIPMENT   
1           5                A1             250           high  
2           5                B1             200           medium 
3           5                B2             200           medium 
4           5                C2             180           medium 
5           5                C2             180           medium 
6           9                old hall       120           low 

显示应该看起来像

1. B1 10
2. C2 3 ...

Answer 1

SELECT  b.Name, a.Seat
FROM    (SELECT     Hall, Seat, COUNT(1) AS SeatCount, RANK() OVER (PARTITION BY Hall ORDER BY COUNT(1) DESC) AS SeatRank
        FROM        SEAT
        GROUP BY    Hall, Seat ) a
            INNER JOIN
        HALL b
        ON a.HALL_IDHALL = b.IDHALL 
WHERE   a.SeatRank = 1

Answer 2

从门票t，大厅h中选择h.name，t.hall_idhall，h.idhall，max（t.seat），其中t.hall_idhall = h.idhall 分组由h.name，t.hall_idhall，h.idhall

组成

尝试以上查询