Sql 查找本年度未续订的成员

成员资格表每年为每个成员包含1条记录（本例简化）

我希望2013年的会员在2014年没有续约。这和我的逻辑一样接近，但我得到的结果是空的

SELECT  Users.UserID
      , YEAR(Membership.MemYear) AS MemYear
      , Users.MailTo
      , Users.StreetAddress
      , Users.Address2
      , Users.City
      , StateLookup.State
      , Users.Zip
FROM Users INNER JOIN Membership 
ON Users.UserID = Membership.UserID 
INNER JOIN StateLookup 
ON Users.StateID = StateLookup.StateID 
where YEAR(Membership.MemYear) = '2013' 
and not exists 
(SELECT  Users.UserID, YEAR(Membership.MemYear) AS MemYear
       , Users.MailTo, Users.StreetAddress, Users.Address2
       , Users.City, StateLookup.State, Users.Zip
FROM Users INNER JOIN Membership AS Membership_1 
ON Users.UserID = Membership_1.UserID 
INNER JOIN StateLookup 
ON Users.StateID = StateLookup.StateID 
where YEAR(Membership_1.MemYear)='2014')

---

感谢您的帮助！

尝试更改查询的底部部分，如下所示：

您忘了引用查询的另一层。假设查询的其余部分正常，这应该可以解决该问题

SELECT Users.UserID,
       YEAR(Membership.MemYear) AS MemYear,
       Users.MailTo,
       Users.StreetAddress,
       Users.Address2,
       Users.City,
       StateLookup.State,
       Users.Zip
  FROM Users
 INNER JOIN Membership
    ON Users.UserID = Membership.UserID
 INNER JOIN StateLookup
    ON Users.StateID = StateLookup.StateID
 where YEAR(Membership.MemYear) = '2013'
   and not exists (SELECT x.UserID,
               YEAR(Membership.MemYear) AS MemYear,
               x.MailTo,
               x.StreetAddress,
               x.Address2,
               x.City,
               StateLookup.State,
               x.Zip
          FROM Users x
         INNER JOIN Membership AS Membership_1
            ON x.UserID = Membership_1.UserID
         INNER JOIN StateLookup
            ON x.StateID = StateLookup.StateID
         where YEAR(Membership_1.MemYear) = '2014'
           and x.UserID = Users.UserID)

---

我想如果“UserID”是唯一的，你可以这样做

SELECT Users.UserID  
  , YEAR(Membership.MemYear) AS MemYear  
  , Users.MailTo  
  , Users.StreetAddress  
  , Users.Address2  
  , Users.City  
  , StateLookup.State 
  , Users.Zip  
 FROM Users INNER JOIN Membership   
 ON Users.UserID = Membership.UserID   
 INNER JOIN StateLookup   
 ON Users.StateID = StateLookup.StateID   
 WHERE Membership.MemYear = '2013'   
 AND Users.UserID NOT IN  
   (SELECT UserID FROM Membership WHERE MemYear = '2014');

您可以使用

MAX（MemYear）

查找成员年数最多为2013年的人。这意味着他们在2013年活跃，没有续约

SELECT Users.UserID
      , Users.MailTo
      , Users.StreetAddress
      , Users.Address2
      , Users.City
      , StateLookup.State
      , Users.Zip
FROM Users 
INNER JOIN Membership 
    ON Users.UserID = Membership.UserID 
INNER JOIN StateLookup 
    ON Users.StateID = StateLookup.StateID 
GROUP BY Users.UserID
      , Users.MailTo
      , Users.StreetAddress
      , Users.Address2
      , Users.City
      , StateLookup.State
      , Users.Zip
HAVING MAX(YEAR(Membership.MemYear)) = 2013

选择Users.UserID
，年份（MemYear.MemYear）为MemYear
，Users.MailTo
，Users.StreetAddress
，Users.Address2
，用户。城市
，StateLookup.State
，Users.Zip
从用户内部加入Users.UserID=Membership.UserID上的成员身份
Users.StateID=StateLookup.StateID上的内部联接StateLookup
where YEAR（Membership.MemYear）为什么需要状态查找，“UserID”不是唯一的？成员表中MemYear列的数据类型是什么？仅供参考，在exists子查询的选择列表中选择什么并不重要，您可能认为您使用的是in子查询。修复该查询的另一种方法是更改“不存在”到“不存在”"。我添加了少于2013年或等于2013年的数据，但它不包括2014年，简单点。会员资格每年每个用户都有一个记录……这意味着你的查询可以为2014年的用户返回结果。虽然你不一定需要第二个select语句。我用
显示的是
而不是
。@MikeSmithDev我的打赌，没有看MEMBERSHI对于重复名称的P表，您是对的，having子句解决了这个问题
SELECT Users.UserID
      , Users.MailTo
      , Users.StreetAddress
      , Users.Address2
      , Users.City
      , StateLookup.State
      , Users.Zip
FROM Users 
INNER JOIN Membership 
    ON Users.UserID = Membership.UserID 
INNER JOIN StateLookup 
    ON Users.StateID = StateLookup.StateID 
GROUP BY Users.UserID
      , Users.MailTo
      , Users.StreetAddress
      , Users.Address2
      , Users.City
      , StateLookup.State
      , Users.Zip
HAVING MAX(YEAR(Membership.MemYear)) = 2013

SELECT  Users.UserID
  , YEAR(Membership.MemYear) AS MemYear
  , Users.MailTo
  , Users.StreetAddress
  , Users.Address2
  , Users.City
  , StateLookup.State
  , Users.Zip
FROM Users INNER JOIN Membership ON Users.UserID = Membership.UserID 
INNER JOIN StateLookup ON Users.StateID = StateLookup.StateID 
where YEAR(Membership.MemYear) <= 2013   /* If it Integer you don't need '' */