Question

我有一个需要订购的查询，然后我需要从中选择特定的行。

错误：

附加信息：ORDER BY子句在视图，内联函数，派生表，子查询和公用表表达式中无效，除非还指定了TOP，OFFSET或FOR XML。

我要做的是以下内容：

"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 + "";

当我按照以下方式执行订单时：

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

然后它首先选择0到25之间的行，然后对其进行排序。但是我想首先订购，然后从该列表中选择25行中的0行。

我还是sql的初学者，总是和Linq一起工作。但这是我的一个旧项目，仍然适用于普通的SQL。

Answer 1

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"
    ;

您已经订购了通过RowNum准备的数据，因此您不需要在子查询中使用TOP或ORDER，只需对最终where子句之后出现的所选行应用订单。

Answer 2

评论ORDER BY网站.Id DESC。＆安培;在

中使用desc这个命令

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

OR 在子查询中使用它。（没有对此行进行评论）

SELECT top 100 percent

无法在查询中订购

2 个答案: