mysql在对组数据进行细分时出现问题

我有三张桌子 成员（成员ID，m_名称，状态ID，地址，DOB，电话） 预订（预订ID、会员ID、会话ID、成本） 会话（会话ID，活动，位置）

（fk memberid，fk sessionid）预订链接到（会员主键）和（会话主键）

课时活动像足球、游泳、羽毛球、网球 我想运行以下查询

查找在2009年12月期间预订了“足球”课程，但没有预订“游泳”课程的所有会员的姓名 sql

我做错了什么？它让我想起了一个有书《足球》和《游泳》的人

SELECT
m_name,
(
    SELECT COUNT(bookingid)
    FROM booking
    WHERE memberid = ROOT.memberid
    AND sessionid = [session.sessionid for football]
) AS FootballSessions,
(
    SELECT COUNT(bookingid)
    FROM booking
    WHERE memberid = ROOT.memberid
    AND sessionid = [session.sessionid for swimming]
) AS SwimmingSessions
FROM member ROOT
HAVING FootballSessions > 0
AND SwimmingSessions = 0

您可能需要说

WHERE

，而不是在末尾附近说

WHERE

，但这应该行得通

SELECT m_name
FROM members
WHERE memberid IN
  ( SELECT b.memberid
    FROM booking b
      JOIN session s
        ON s.sessionid = b.sessionid
    WHERE s.activity = "football"
  )
AND memberid NOT IN
  ( SELECT b.memberid
    FROM booking b
      JOIN session s
        ON s.sessionid = b.sessionid
    WHERE s.activity = "swimming"
  )

或

或

这看起来很可疑：

bb上的内部加入预订bb.bookingid=mm.memberid

SELECT m_name
FROM members
WHERE memberid IN
  ( SELECT b.memberid
    FROM booking b
      JOIN session s
        ON s.sessionid = b.sessionid
    WHERE s.activity = "football"
  )
AND memberid NOT IN
  ( SELECT b.memberid
    FROM booking b
      JOIN session s
        ON s.sessionid = b.sessionid
    WHERE s.activity = "swimming"
  )

SELECT m.m_name
FROM members m
WHERE EXISTS
  ( SELECT 0
    FROM booking b
      JOIN session s
        ON s.sessionid = b.sessionid
    WHERE s.activity = "football"
      AND b.memberid = m.memberid
  )
AND NOT EXISTS
  ( SELECT 0
    FROM booking b
      JOIN session s
        ON s.sessionid = b.sessionid
    WHERE s.activity = "swimming"
      AND b.memberid = m.memberid
  )

SELECT m.m_name
FROM booking b 
  JOIN members m
    ON m.memberid = b.memberid
  JOIN session s
    ON s.sessionid = b.sessionid
WHERE s.activity IN ("football", "swimming")
GROUP BY b.memberid
HAVING COUNT(s.activity = "swimming") = 0