MS脚本查询无法正常工作或无法运行

Question

我正在尝试创建一个查询，以通过连接3个表来显示前24个浏览量最高的页面。

但是，我无法使其正常工作。通常，使用UNION，JOIN或编写的函数/脚本的一部分都有问题。

这些表是：

+---------------+
| dbo_Good_URLs |
+---------------+
| Url           |
| HTTPAlias     |
| PortalID      |
| page_title    |
+---------------+

+-----------------+
| dbo_vw_GoodURLs |
+-----------------+
| URL             |
| PortalID        |
| HTTPAlias       |
| Title           |
+-----------------+

+-----------------------+
| dbo_analytics_history |
+-----------------------+
| URL                   |
| PortalId              |
| HTTPAlias             |
| Page_Title            |
| Report_Month          |
| Report_Year           |
| Pageviews             |
| Unique_Pageviews      |
| Entrances             |
| Total_Time_on_Page    |
| Bounces               |
| Exits                 |
| Avg_Time_on_Page      |
| Bounce_Rate           |
| Exit_Rate             |
+-----------------------+

我尝试使用IIF(Is Null(**)，并且一直在寻找脚本本身，以了解为什么UNION和JOIN似乎不起作用，而且我似乎无法弄清楚出来。

这整个星期我一直在玩耍，只是没有来找我。

SELECT TOP 24 dbo_Good_URLs.Url, Nz(dbo_analytics_history.Pageviews, 0) AS Total_Pageviews,
Nz(dbo_analytics_history.Pageviews, 0) AS Month1
FROM (SELECT Url FROM dbo_Good_URLs WHERE HTTPAlias IN ('x.org', 'ab.x.org'))
 UNION 
SELECT Url FROM dbo_vw_GoodURLs WHERE dbo_Good_URLs.HTTPAlias IN ('x.org', 'ab.x.org')
LEFT OUTER JOIN dbo_analytics_history
ON dbo_Good_URLs.Url = dbo_analytics_history.URL AND dbo_analytics_history.HTTPAlias IN ('x.org', 'ab.x.org') AND dbo_analytics_history.Report_Month = 10
GROUP BY dbo_Good_URLs.Url, dbo_analytics_history.Pageviews
ORDER BY Nz(dbo_analytics_history.Pageviews, 0) DESC;

我要查找的结果是显示10月份（即第10个月）浏览的前24页

Answer 1

我可能会猜测您实际上正在寻找以下内容：

select top 24 q.url, nz(a.pageviews, 0) as Total_Pageviews, nz(a.pageviews, 0) as Month1
from 
    (
        select dbo_good_urls.url from dbo_good_urls 
        where dbo_good_urls.httpalias in ('x.org', 'ab.x.org')
        union 
        select dbo_vw_goodurls.url from dbo_vw_goodurls 
        where dbo_vw_goodurls.httpalias in ('semcog.org', 'loggedin.semcog.org')
    ) q
    left join dbo_analytics_history a on q.url = a.url
)
where
    a.report_month is null or a.report_month = 10
order by 
    nz(a.pageviews, 0) desc;

在这里，目标URL是由两个联合的子查询选择的，这种联合的结果在dbo_analytics_history字段上与您的url表相连。