Question

在我的工作中，我尝试创建一个查询以从SQL数据库中获取一些信息。这样做很好，但是当我尝试使用日期范围时，它会停止工作。

我已经找到了DATEPART功能，

SELECT
 * 
FROM 
InlogLog as il 
INNER JOIN 
ComputerIdentity as ci
ON il.Computer = ci.Description 
WHERE ci.Location 
LIKE 'E18%'
AND ci.MakeModelID = 9
AND DATEPART(YY,il.Datum) = 2016
AND DATEPART(MM,il.Datum) = 10 
AND DATEPART(DD,il.Datum) = 03 
ORDER BY il.Computer

在上面的示例中，我无法指定两个日期之间的范围。我也尝试过使用这个例子

SELECT
 * 
FROM 
InlogLog as il 
INNER JOIN 
ComputerIdentity as ci
ON il.Computer = ci.Description 
WHERE ci.Location 
LIKE 'E18%'
AND ci.MakeModelID = 9
AND il.Datum = '2016-06-17 09:57:00.000'

但是这会导致错误消息

将varchar数据类型转换为日期时间数据类型会导致超出范围的值。

如何使下一个示例正常工作？

SELECT
 * 
FROM 
InlogLog as il 
INNER JOIN 
ComputerIdentity as ci
ON il.Computer = ci.Description 
WHERE ci.Location 
LIKE 'E18%'
AND ci.MakeModelID = 9
AND il.Datum '2016-06-17 09:57:00.000' BETWEEN '2016-06-18 00:00:00.000'

Answer 1

问题在于语法（il.Datum '2016-06-17 09:57:00.000' BETWEEN '2016-06-18 00:00:00.000'），修改你的脚本如下。

如果您的列是varchar，请将其转换为datetime。

SELECT * 
FROM 
InlogLog as il 
INNER JOIN 
ComputerIdentity as ci
ON il.Computer = ci.Description 
WHERE ci.Location 
LIKE 'E18%'
AND ci.MakeModelID = 9
AND CAST(il.Datum as datetime) BETWEEN '2016-06-17 09:57:00.000' AND  '2016-06-18 00:00:00.000'

Answer 2

看起来Datum属于varchar数据类型，它应该是datetime数据类型

试试这个

SELECT
 * 
FROM 
InlogLog as il 
INNER JOIN 
ComputerIdentity as ci
ON il.Computer = ci.Description 
WHERE ci.Location 
LIKE 'E18%'
AND ci.MakeModelID = 9
AND il.Datum >='2016-06-17 09:57:00.000' il.Datum<= '2016-06-18 00:00:00.000'

Answer 3

如果il.Datum是varchar类型，那么你应该按如下方式进行转换：

SELECT
 * 
FROM 
InlogLog as il 
INNER JOIN 
ComputerIdentity as ci
ON il.Computer = ci.Description 
WHERE ci.Location 
LIKE 'E18%'
AND ci.MakeModelID = 9
AND CONVERT(DATE, ilDatum) >= CONVERT(DATE, '2016-10-01')
AND CONVERT(DATE, ilDatum) <= CONVERT(DATE, '2016-10-04')

注意：我已将varchar转换为列il.Datum的日期类型。如果没有专门针对varchar类型的转换，则无法过滤日期。

Answer 4

 SELECT * FROM InlogLog as il INNER JOIN
 ComputerIdentity as ci 
 ON il.Computer = i.Description WHERE ci.Location
 LIKE 'E18%' AND ci.MakeModelID = 9 AND
 DATEDIFF(DAY,ilDatum,'2016-06-17') <= 0 AND
 DATEDIFF(DAY,ilDatum,'2016-06-18') >=0

如何在日期之间从SQL数据库中选择内容？

4 个答案: