Question

我有这个问题与查询这两个表之间没有任何链接，我试图结合。表1的有效期和到期日必须与PollDate的表2相关联。 PollDate不得介于有效期和失效期之间。

Table 1
ClientID    EffectiveDate       ExpirationDate
1       2009-04-01 00:00:00.000 2009-12-18 00:00:00.000
1       2010-02-12 00:00:00.000 2010-03-05 00:00:00.000
1       2010-05-18 00:00:00.000 NULL
1       2009-12-21 00:00:00.000 2010-02-08 00:00:00.000
1       2010-12-19 00:00:00.000 2009-12-20 00:00:00.000

Table 2
ClientID    PollDate
1       2009-12-20 00:00:00.000
1       2009-12-19 00:00:00.000
1       2010-02-12 00:00:00.000
1       2010-02-27 00:00:00.000
1       2010-05-19 00:00:00.000
1       2010-05-29 00:00:00.000
1       2010-05-30 00:00:00.000
1       2010-05-31 00:00:00.000
1       2010-06-05 00:00:00.000
1       2010-06-25 00:00:00.000
1       2010-06-27 00:00:00.000
1       2010-07-02 00:00:00.000
1       2010-08-04 00:00:00.000
1       2010-08-20 00:00:00.000

Result
ClientID    inValidDate
1       2009-12-20 00:00:00.000
1       2009-12-19 00:00:00.000

Answer 1

不确定语法，但你想做这样的事情。

select clientID, polDate as 'inValidDate'
FROM Table1 t1
INNER JOIN Table2 t2
ON t2.PolDate not in between t1.EffectiveDate and t1.ExpirationDate

编辑：假设到期日期为空，则表示策略永不过期。

select clientID, polDate as 'inValidDate'
FROM Table1 t1
INNER JOIN Table2 t2
ON t2.PolDate not in between t1.EffectiveDate and ISNULL(t1.ExpirationDate, '2999-01-01')

Answer 2

你可以尝试：

select t2.ClientID, t2.PoolDate
from Table1 t1, Table2 t2
where t2.PollDate between t1.EffectiveDate and t1.ExpirationDate

因为你没有加入连接条件，table1的每一行都会与table2的每一行匹配

Answer 3

以下是@ AJP结果的略微变化 - 只考虑ExpirationDate中的NULL值：

CREATE TABLE #Table1
(
    [ClientID] INT,
    [EffectiveDate] DATETIME,
    [ExpirationDate] DATETIME
)

INSERT INTO #Table1
(
    [ClientID],
    [EffectiveDate],
    [ExpirationDate]
)
SELECT 1, '2009-04-01', '2009-12-18' UNION
SELECT 1, '2010-02-12', '2010-03-05' UNION
SELECT 1, '2010-05-18', NULL UNION
SELECT 1, '2009-12-21', '2010-02-08' UNION
SELECT 1, '2010-12-19', '2009-12-20'

CREATE TABLE #Table2
(
    [ClientID] INT,
    [PollDate] DATETIME
)

INSERT INTO #Table2
(
    [ClientID],
    [PollDate]
)
SELECT 1, '2009-12-20' UNION
SELECT 1, '2009-12-19' UNION
SELECT 1, '2010-02-12' UNION
SELECT 1, '2010-02-27' UNION
SELECT 1, '2010-05-19' UNION
SELECT 1, '2010-05-29' UNION
SELECT 1, '2010-05-30' UNION
SELECT 1, '2010-05-31' UNION
SELECT 1, '2010-06-05' UNION
SELECT 1, '2010-06-25' UNION
SELECT 1, '2010-06-27' UNION
SELECT 1, '2010-07-02' UNION
SELECT 1, '2010-08-04' UNION
SELECT 1, '2010-08-20'

SELECT
    t2.[ClientID],
    t2.[PollDate] AS 'inValidDate'
FROM
    #Table1 AS t1
JOIN
    #Table2 AS t2
ON
    (t2.[PollDate] < t1.[EffectiveDate]
OR  t2.[PollDate] > ISNULL(t1.[ExpirationDate], '9999-12-31'))
AND t1.ClientID = t2.ClientID -- Not clear from your question if this is necessary

SQL查询从2个不同的表中获取到期日期和生效日期之间的日期

3 个答案: