Question

TableA（id int，match1 char，match2 char，match3 char，startdate datetime，enddate，status char）

id match1  match2  match3  startdate   enddate
1  AAA     BBB     CCC     2006-01-01  2007-01-01 
2  AAA     BBB     CCC     2006-12-12  2008-01-01
3  AAA     BBB     CCC     2008-01-01  2012-02-02

4  DDD     EEE     FFF     2009-01-01  2012-01-01
5  DDD     EEE     FFF     2013-01-01  2020-01-01

参考表B（match1 char，match2，match3，startdate datetime，enddate）

match1  match2 match3  startdate   enddate
AAA     BBB    CCC     2006-01-01  2015-01-01
DDD     EEE    FFF     2009-01-01  2015-01-01

好的，[Stat]为NULL，我必须在tableA中使用'FAIL'填充stat：

1）为了匹配tableB中的match1，match2，match3，日期（开始和结束）存在于范围之外。让我们看看ID = 5 effectivedates = 2013 - 2020但是在其参考表中，它的2009-2015所以ID = 5会得到'失败'。

2）在集合中，set是match1，match2，match3相等时的记录，因此ID 123是一组，ID 4＆amp; 5是另一组。因此，在一组中，有效日期（开始和结束）日期重叠。即使集合1（ID1,2,3）存在于参考表中其相应记录的日期范围内，但ID = 2的生效日期与ID = 1的生效日期重叠，因此ID = 2得到'失败'

预期结果：

id match1  match2  match3  startdate   enddate     stat
1  AAA     BBB     CCC     2006-01-01  2007-01-01  NULL
2  AAA     BBB     CCC     2006-12-12  2008-01-01  FAIL
3  AAA     BBB     CCC     2008-01-01  2012-02-02  NULL
4  DDD     EEE     FFF     2009-01-01  2012-01-01  NULL
5  DDD     EEE     FFF     2013-01-01  2020-01-01  FAIL

先谢谢。

Answer 1

UPDATE tableA SET [status] = 'FAIL'
FROM tableB 
WHERE tableB.match1 = tableA.match1 
AND tableB.match2 = tableA.match2 
AND tableB.match3 = tableA.match3
AND tableA.startDate >= tableB.startDate 
AND tableA.endDate <= tableB.endDate

编辑（我认为我可能过于简单了） EDIT2 - 改变了第二个WHERE

SELECT  --  Things outside of allowed date range
id 
FROM TableA 
JOIN TableB ON TableB.match1 = TableA.match1 
    AND TableB.match2 = TableA.match2
    AND TableB.match3 = TableA.match3 
WHERE TableA.startDate < TableB.startDate 
    OR TableA.endDate > TableB.endDate 
UNION 
SELECT  --  Things with overlapping date ranges
TableA2.id 
FROM TableA    
JOIN TableA AS TableA2 ON TableA2.match1 = TableA.match1
    AND TableA2.match2 = TableA.match2      
    AND TableA2.match3 = TableA.match3    
WHERE TableA2.startDate BETWEEN TableA.startDate AND TableA.endDate 
    OR TableA2.endDate BETWEEN TableA.startDate AND TableA.endDate
    OR (TableA2.startDate < TableA.startDate AND TableA2.endDate > TableA.endDate)

Answer 2

SQL声明

;WITH CandidateIDs AS (
    SELECT  idOriginal = YourTable.id, idFailCandidate = ed.id
    FROM    YourTable
            INNER JOIN YourTable ed ON ed.match1 = YourTable.match1
                               AND ed.match2 = YourTable.match2
                               AND ed.startdate BETWEEN YourTable.startdate AND YourTable.enddate
                               AND ed.id <> YourTable.id
)                              
SELECT  *
FROM    YourTable
        INNER JOIN (
            SELECT  idFailCandidate
            FROM    CandidateIDs r1
            WHERE   NOT EXISTS (SELECT * FROM CandidateIDs WHERE CandidateIDs.idFailCandidate = r1.idOriginal)
        ) fail ON fail.idFailCandidate = YourTable.id

测试脚本

;WITH YourTable (id, match1, match2, startdate, enddate, status) AS (
    SELECT 1, 'AAA', 'BBB', CAST('2006-01-01' AS DATETIME), CAST('2007-01-01' AS DATETIME), NULL
    UNION ALL SELECT 2, 'AAA', 'BBB', '2006-12-12', '2008-01-01', NULL
    UNION ALL SELECT 3, 'AAA', 'BBB', '2008-01-01', '2012-02-01', NULL
    UNION ALL SELECT 4, 'AAA', 'BBB', '2002-01-01', '2004-01-01', NULL
    UNION ALL SELECT 5, 'DDD', 'EEE', '2009-01-01', '2012-01-01', NULL
    UNION ALL SELECT 6, 'DDD', 'EEE', '2011-01-01', '2020-01-01', NULL
    UNION ALL SELECT 7, 'DDD', 'EEE', '2013-01-01', '2015-01-01', NULL
    UNION ALL SELECT 8, 'DDD', 'EFG', '2009-01-01', '2012-01-01', NULL
)
, CandidateIDs AS (
    SELECT  idOriginal = YourTable.id, idFailCandidate = ed.id
    FROM    YourTable
            INNER JOIN YourTable ed ON ed.match1 = YourTable.match1
                               AND ed.match2 = YourTable.match2
                               AND ed.startdate BETWEEN YourTable.startdate AND YourTable.enddate
                               AND ed.id <> YourTable.id
)                              
SELECT  *
FROM    YourTable
        INNER JOIN (
            SELECT  idFailCandidate
            FROM    CandidateIDs r1
            WHERE   NOT EXISTS (SELECT * FROM CandidateIDs WHERE CandidateIDs.idFailCandidate = r1.idOriginal)
        ) fail ON fail.idFailCandidate = YourTable.id

日期重叠场景

2 个答案: