Question

我想选择日期

之间的值

表1

Code Period  Datefrom   dateto     Value
001  07/2011 01/07/2009 10/07/2009 100
211  07/2009 01/07/2009 05/07/2009 200

从上表我想检查datefrom和dateto之间的日期，如果日期在datefrom之间或等于date，则意味着它应该返回empcode的值

尝试查询

SELECT Value
FROM table1
Where Period = '07/2009'
and Code = '211'
and Cast('02/07/2009' as Datetime) between datefrom and dateto

预期产出：

code value
211  200

以上查询显示空值，应返回200。

我的查询有什么问题？

Answer 1

默认情况下，Cast('02/07/2009' as Datetime)为您带来2月7日请改用

SELECT Code, Value 
FROM table1 
Where 
    Period = '07/2009' 
and Code = '211'  
and CONVERT(DATETIME, '02/07/2009', 103) between datefrom and dateto

<强> BUT

如果它们属于varchar类型，您可能必须将datefrom和dateto列转换为。

Answer 2

 SELECT Code, Value
 from table1 
 where Period = '07/2009' 
 and Code = '211'
 and DateFrom <='02/07/2009'
 and DateTo >= '02/07/2009'

Answer 3

您可以使用以下查询

SELECT   code
       , value 
FROM   table1 
WHERE  period = '07/2009' 
AND    code   = '211' 
AND    convert(datetime,'02/07/2009',101) 
       between 
       convert(datetime,datefrom,101) and convert(datetime,dateto,101)

如何获取两个日期的值

3 个答案: