SQL 服务器 - 动态多列数据透视表

Question

我有这样的结果，Annual 是动态的，可能有 X 个范围

+-----------+---------+-----------+
| Annual    | Revenue | Completed |
+-----------+---------+-----------+
| 2020/2021 | 1000    | Yes       |
+-----------+---------+-----------+
| 2021/2022 | 2000    | Yes       |
+-----------+---------+-----------+
| 2022/2023 | 2500    | No        |
+-----------+---------+-----------+

我希望得到这样的结果：

+-----------+-----------+-----------+-----------+
| Annual    | 2020/2021 | 2021/2022 | 2022/2023 |
+-----------+-----------+-----------+-----------+
| Revenue   | 1000      | 2000      | 2500      |
+-----------+-----------+-----------+-----------+
| Completed | Yes       | Yes       | No        |
+-----------+-----------+-----------+-----------+

这是我目前得到的结果，我可以在我的本地执行但似乎无法让它在 sqlfiddle 上执行： http://sqlfiddle.com/#!18/a4c61/4

我查看了整个 Whosebug 的例子，但似乎找不到像我这样的确切案例。

如果可以请帮忙，谢谢！

Sql version: Microsoft SQL Azure (RTM) - 12.0.2000.8   May 15 2020 00:47:08

Answer 1

动态数据推荐

您可以获取计数并使用 StringBuilder 生成 strSQL。

        StringBuilder strSQL = new StringBuilder();
        int DataAmount = 3;// a,b,c,d,e
        Dictionary<int, string> dic = new Dictionary<int, string>();
        dic.Add(0 ,"a");
        dic.Add(1, "b");
        dic.Add(2, "c");
        strSQL.Append("select ");
        strSQL.Append(" isnull(a.Column2,b.Column2) Column0,isnull(a.Column1,0) Column1 ");
        //dic.Count > 2
        for (int i = 1; i < dic.Count; i++)
        {
            strSQL.Append(",isnull("+dic[i]+".Column1,0) Column"+i+" ");
        }
        strSQL.Append(" from (SELECT ID,Column1,Column2 FROM [dbo].[20200618] UNPIVOT(Column1 for Column2 in ([Annual],[Revenue],[Completed]))b where ID=1) a ");

        for (int j = 1; j < dic.Count; j++)
        {
            strSQL.Append("FULL JOIN (SELECT ID, Column1, Column2 FROM[dbo].[20200618] UNPIVOT(Column1 for Column2 in ([Annual],[Revenue],[Completed])) " + dic[j] + "  where ID = " + (j+1)+ ") " + dic[j] + " on a.Column2 = " + dic[j]+".Column2 ");
        }
       // SqlHelper.ExcuteNoQuery(strSQL.ToString());

SQL查询部分

我的 azure sqlserver 中的数据。

当运行 SELECT *FROM [dbo].[20200618] .

运行 SELECT ID,Column1,Column2 FROM [dbo].[20200618] UNPIVOT(Column1 for Column2 in ([Annual],[Revenue],[Completed]))b where ID=2.

最后，运行代码。

select isnull(a.Column2,b.Column2) Column0,isnull(a.Column1,0) Column1,isnull(b.Column1,0) Column2,isnull(c.Column1,0) Column3 from (SELECT ID,Column1,Column2 FROM [dbo].[20200618] UNPIVOT(Column1 for Column2 in ([Annual],[Revenue],[Completed]))b where ID=1) a FULL JOIN (SELECT ID,Column1,Column2 FROM [dbo].[20200618] UNPIVOT(Column1 for Column2 in ([Annual],[Revenue],[Completed]))b where ID=2) b on a.Column2=b.Column2 FULL JOIN (SELECT ID,Column1,Column2 FROM [dbo].[20200618] UNPIVOT(Column1 for Column2 in ([Annual],[Revenue],[Completed]))b where ID=3) c on a.Column2=c.Column2

SQL 服务器 - 动态多列数据透视表

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