MySQL-根据日期和类别提取列表

这是对这个问题的补充

我有一张这样的桌子：

ID_____PostingDate_____PosterID____CategoryID
----------------------------------------------
1______05/01/2012______450_________a
2______05/30/2012______451_________a
3______06/17/2012______451_________b
4______12/10/2012______451_________c
5______06/14/2012______452_________l
6______09/15/2012______452_________l
7______05/01/2012______453_________m
8______07/04/2012______453_________n
9______04/05/2013______454_________p
10_____05/05/2012______454_________l
11_____06/12/2012______455_________x
12_____10/02/2012______455_________x
13_____02/12/2013______455_________y

PosterID_______PostingDate______CategoryID
--------------------------
450____________05/01/2012_______a
451____________05/30/2012_______a
451____________06/17/2012_______b
453____________05/01/2012_______m
454____________05/05/2013_______l

我正在尝试获取所有PosterID（包括可能的重复项）和CategoryID的列表，这些PosterID已在2012年5月或6月发布，但此后在同一类别内再也没有发布过

上表中的预期结果：

ID_____PostingDate_____PosterID____CategoryID
----------------------------------------------
1______05/01/2012______450_________a
2______05/30/2012______451_________a
3______06/17/2012______451_________b
4______12/10/2012______451_________c
5______06/14/2012______452_________l
6______09/15/2012______452_________l
7______05/01/2012______453_________m
8______07/04/2012______453_________n
9______04/05/2013______454_________p
10_____05/05/2012______454_________l
11_____06/12/2012______455_________x
12_____10/02/2012______455_________x
13_____02/12/2013______455_________y

PosterID_______PostingDate______CategoryID
--------------------------
450____________05/01/2012_______a
451____________05/30/2012_______a
451____________06/17/2012_______b
453____________05/01/2012_______m
454____________05/05/2013_______l

以下是我尝试过的：

ID_____PostingDate_____PosterID____CategoryID
----------------------------------------------
1______05/01/2012______450_________a
2______05/30/2012______451_________a
3______06/17/2012______451_________b
4______12/10/2012______451_________c
5______06/14/2012______452_________l
6______09/15/2012______452_________l
7______05/01/2012______453_________m
8______07/04/2012______453_________n
9______04/05/2013______454_________p
10_____05/05/2012______454_________l
11_____06/12/2012______455_________x
12_____10/02/2012______455_________x
13_____02/12/2013______455_________y

PosterID_______PostingDate______CategoryID
--------------------------
450____________05/01/2012_______a
451____________05/30/2012_______a
451____________06/17/2012_______b
453____________05/01/2012_______m
454____________05/05/2013_______l

菲利佩·席尔瓦的屈膝礼

SELECT DISTINCT PosterID
FROM table1
WHERE PostingDate BETWEEN '2012-05-01' AND '2012-06-30'
AND posterID NOT IN (SELECT PosterID
  FROM table1
  WHERE PostingDate > '2012-07-01');

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尽管这只会删除那些在任何类别中再次发布的PosterID，而不是特定于类别的

，但您必须在CategoryID字段中交叉两个选择的结果。 我认为这应该奏效：

SELECT DISTINCT PosterID
FROM table1 x
WHERE PostingDate BETWEEN '2012-05-01' AND '2012-06-30'
AND posterID NOT IN (SELECT PosterID
  FROM table1 y
  WHERE PostingDate > '2012-07-01' AND x.CategoryID = y.CategoryID);  

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干净、简单、有效。非常感谢。一个全新的欢迎！为了社区，维罗尼卡！