Question

我正在尝试识别一些在MS Access的时间范围以外访问系统的用户的任何活动。

我有两个桌子。

Table 1: Log    
----------    
userid     
date/time ------------- DATE TIME Format they accessed    
location -------------- where they accessed (full URL format) 

Table 2: Schedule    
-----------    
system URL ------------ Subdomain URL   
window start    ------- TIME format
window end    --------- TIME format
window day (days of the week when this window is applicable) - 1 - 7 where 1 is Sunday and 7 is Saturday.

我该如何过滤掉以识别那些在窗口时间之外访问系统的用户？

Answer 1

您将要使用内部联接使用SQL查询

--This line selects the fields that we want to take from the first table
SELECT table1.userID, table1.accessTime, table1.systemURL

FROM table1

INNER JOIN 

--where the urls are the same
ON table2.systemURL = table1.systemURL

--compare the dates to see if it accessed outside of the window
WHERE table1.accessTime<=table2.windowStart Or table1.accessTime>=table2.windowEnd;

但是请下次让我们知道您尝试过什么

Answer 2

根据所提供的有限信息，我可能会提出类似的建议：

select 
    t1.userid, 
    t1.[time they accessed], 
    t1.[where they accessed]
from 
    log t1 inner join schedule t2 on 
    t1.[where they accessed] = t2.[system URL]
where not
    t1.[time they accessed] between t2.[window start] and t2.[window end]

您可能还需要针对[window day]进行测试，但是我不确定如何在您的数据库中实现它。

查询两个表之间的日志和访问

2 个答案: