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我需要找到所有满足以下条件的 CID（合同）

  1. 它们在 2011 年 1 月 1 日至 2011 年 6 月 30 日之间有效（可以在截止开始日期之前或之后开始，并且可以在截止结束日期之前或之后结束），但它们必须在这些日期之间有效
  2. 它们在 2011 年 1 月 1 日至 2011 年 6 月 30 日之间至少活跃 90 天

我能想到的唯一解决方案是unpivot在日期范围内的每一天都有一个 1，在该范围之外的日子有一个 0。然后我们可以总结 1，如果它大于 2011 年前六个月的天数，则包括该合同。

有没有更好的办法？

这是生成数据的方法

      Select CID = 5439, ContractStartTime = '2008-06-26 00:00:00.000', ContractStopTime  = '2012-01-29 00:00:00.000'
UNION Select CID = 6216, ContractStartTime = '2008-07-02 00:00:00.000', ContractStopTime  = '2010-12-02 00:00:00.000'
UNION Select CID = 7770, ContractStartTime = '2008-12-03 00:00:00.000', ContractStopTime  = '2010-12-01 00:00:00.000'
UNION Select CID = 12432, ContractStartTime = '2009-12-17 00:00:00.000', ContractStopTime  = '2010-12-15 00:00:00.000'
UNION Select CID = 13986, ContractStartTime = '2009-05-11 00:00:00.000', ContractStopTime  = '2011-05-09 00:00:00.000'
UNION Select CID = 14763, ContractStartTime = '2009-12-28 09:00:00.000', ContractStopTime  = '2012-03-25 00:00:00.000'
UNION Select CID = 16317, ContractStartTime = '2010-12-08 00:00:00.000', ContractStopTime  = '2011-12-06 00:00:00.000'
UNION Select CID = 20979, ContractStartTime = '2010-10-14 00:00:00.000', ContractStopTime  = '2012-12-12 00:00:00.000'
UNION Select CID = 17871, ContractStartTime = '2010-01-20 00:00:00.000', ContractStopTime  = '2012-01-19 00:00:00.000'
UNION Select CID = 19425, ContractStartTime = '2010-02-23 00:00:00.000', ContractStopTime  = '2012-02-21 00:00:00.000'
UNION Select CID = 21756, ContractStartTime = '2010-12-28 00:00:00.000', ContractStopTime  = '2012-12-25 00:00:00.000'
UNION Select CID = 20202, ContractStartTime = '2011-02-24 00:00:00.000', ContractStopTime  = '2012-05-02 00:00:00.000'
UNION Select CID = 22533, ContractStartTime = '2010-12-27 00:00:00.000', ContractStopTime  = '2011-01-26 00:00:00.000'
UNION Select CID = 23310, ContractStartTime = '2010-06-21 00:00:00.000', ContractStopTime  = '2011-06-21 00:00:00.000'
UNION Select CID = 24864, ContractStartTime = '2010-07-25 00:00:00.000', ContractStopTime  = '2012-12-26 00:00:00.000'
UNION Select CID = 27195, ContractStartTime = '2011-01-11 00:00:00.000', ContractStopTime  = '2013-01-09 00:00:00.000'
UNION Select CID = 27972, ContractStartTime = '2011-01-04 00:00:00.000', ContractStopTime  = '2013-01-02 00:00:00.000'
UNION Select CID = 29526, ContractStartTime = '2011-01-28 00:00:00.000', ContractStopTime  = '2012-01-29 00:00:00.000'
UNION Select CID = 33411, ContractStartTime = '2011-04-28 00:00:00.000', ContractStopTime  = '2011-04-27 00:00:00.000'
UNION Select CID = 34965, ContractStartTime = '2011-06-14 00:00:00.000', ContractStopTime  = '2012-06-11 00:00:00.000'
UNION Select CID = 35742, ContractStartTime = '2011-06-07 00:00:00.000', ContractStopTime  = '2011-07-06 00:00:00.000'
UNION Select CID = 39627, ContractStartTime = '2012-01-12 00:00:00.000', ContractStopTime  = '2013-01-10 00:00:00.000'
UNION Select CID = 40404, ContractStartTime = '2011-11-30 00:00:00.000', ContractStopTime  = '2012-07-29 00:00:00.000'
UNION Select CID = 48951, ContractStartTime = '2012-06-21 00:00:00.000', ContractStopTime  = '2012-07-22 00:00:00.000'
Order by 3
4

1 回答 1

3

在 1 月至 6 月的窗口中有 90 个活跃天数的 CID...

DECLARE
  @windowStart DATETIME,
  @windowEnd   DATETIME
SELECT
  @windowStart = '20110101',
  @windowEnd   = '20110701'

SELECT
  *
FROM
  yourTable
WHERE
      contractStopTime  >= @windowStart
  AND contractStartTime <  @windowEnd
  AND DATEDIFF(
        DAY,
        CASE WHEN ContractStartTime >= @windowStart THEN contractStartTime ELSE @windowStart END,
        CASE WHEN ContractStopTime  <  @windowEnd   THEN contractStopTime  ELSE @windowEnd   END
      ) >= 90
于 2012-06-28T16:43:10.807 回答