无法在查询中订购

我有一个需要排序的查询，然后我需要从中选择特定的行。无法在查询中订购

错误：

Additional information: The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP, OFFSET or FOR XML is also specified.

我所试图做的是以下几点：

"SELECT * FROM (SELECT" + 
         " Websites.Id as websiteId, " + 
         " Websites.Title, " + 
         " Websites.Description, " + 
         " Websites.Url, " + 
         " Websites.BannerURL, " + 
         " (Select Count(*) From Votes where WebsiteID = Websites.Id And [Unique] = 1 And Date = '" + 
         Date + "') as TotalVotes, " + 
         " ISNULL((Select AVG(rating) From WebsiteRating where WebsiteID = Websites.Id), 5) as Rating, " + 
         " Users.Username, " + 
         " (Select Count(*) From Redirects where WebsiteID = Websites.Id And [Unique] = 1 And Date = '" + 
         Date + "') as Redirects, " + 
         " RowNum = ROW_NUMBER() OVER (ORDER BY Websites.ID) " + 
         " FROM Websites " + 
         " INNER JOIN Users ON Websites.UserID = Users.Id " + 
         " Where Websites.Enabled = 1" + 
         " GROUP BY Websites.Title, Websites.Description, Websites.Url, Websites.BannerURL , Users.Username, Websites.Id" + 
         // Error 
         " ORDER BY Websites.Id DESC" + 
         ") as Table1 " + 
         "WHERE RowNum > " + number + " And RowNum <= " + amount + "";

当我通过后做的顺序：

"WHERE RowNum > " + number + " And RowNum <= " + amount + "";

然后首先选择从0到25的行，然后排序。但我想先订购它，然后从该列表中选择25行。

我仍然是一个初学sql，总是与Linq合作。但这是我的一个旧的项目，仍然可以使用普通的sql。

来源

2014-09-27 Jamie

试试这个：

"SELECT * FROM (SELECT" + 
    " Websites.Id as websiteId, " + 
    " Websites.Title, " + 
    " Websites.Description, " + 
    " Websites.Url, " + 
    " Websites.BannerURL, " + 
    " (Select Count(*) From Votes where WebsiteID = Websites.Id And [Unique] = 1 And Date = '" + 
    Date + "') as TotalVotes, " + 
    " ISNULL((Select AVG(rating) From WebsiteRating where WebsiteID = Websites.Id), 5) as Rating, " + 
    " Users.Username, " + 
    " (Select Count(*) From Redirects where WebsiteID = Websites.Id And [Unique] = 1 And Date = '" + 
    Date + "') as Redirects, " + 
    " RowNum = ROW_NUMBER() OVER (ORDER BY Websites.ID) " + 
    " FROM Websites " + 
    " INNER JOIN Users ON Websites.UserID = Users.Id " + 
    " Where Websites.Enabled = 1" + 
    " GROUP BY Websites.Title, Websites.Description, Websites.Url, Websites.BannerURL , Users.Username, Websites.Id" + 
    ") as Table1 " + 
    " WHERE RowNum > " + number + " And RowNum <= " + amount + "" + 
    " ORDER BY RowNum DESC" 
    ;

你已经已经订购了通过RowNum准备的数据，因此您不需要在子查询中使用TOP或ORDER，只需将命令应用于所选行这发生在最后的where子句之后。

来源

2014-09-27 08:32:34

谢谢，如果我想按子查询命令：TotalVotes？ – Jamie 2014-09-27 10:44:55

您可以在子查询完成后使用我介绍的where子句位置按任意列进行排序。但是，记住你的行选择是基于特定的顺序，所以如果你改变了演示顺序，你还需要改变RowNum的计算方式。 – 2014-09-27 12:50:38

注释掉ORDER BY Websites.Id DESC。。 &使用ORDER BY DESC这个在

RowNum = ROW_NUMBER() OVER (ORDER BY Websites.ID Desc)

OR 使用此子查询中（上面这一行没有评论）

SELECT top 100 percent

来源

2014-09-27 08:24:11

无法在查询中订购

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