SQL Query從2個不同的表中獲取到期日期和生效日期之間的日期

Question

我有這個問題與查詢這兩個表之間沒有任何聯繫，我試圖結合。表1的有效期和截止日必須與PollDate的表2相關聯。 PollDate不得位於有效期和到期日之間。

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

的每一行匹配下面是一個輕微的變化@ AJP的結果 - 在ExpirationDate中只佔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 

Answer 2

不確定關於syntext，但你想做這樣的事情。

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

編輯： 假設，如果到期日爲空意味着政策將永不過期。

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 3

u能嘗試：

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

，因爲ü沒有把在連接條件，表1中的每一行將與表2