sql - 另一种处理动态排序的方法

Question

鉴于：

您可以通过指示列的索引对结果集进行排序。

SELECT * FROM CUSTOMERS ORDERY BY 1

我正在尝试在以下上下文中使用，但是，我收到错误消息：

消息 5308，级别 16，状态 1，第 8 行窗口函数不支持整数索引作为 ORDER BY 子句表达式。

EXEC ("
SELECT  *, 
        ROW_NUMBER() OVER ( ORDER BY 1 ) AS 'Seq'   
from dynamic_table");

你能想出一个变通办法吗？

Answer 1

如果您知道列名，这应该可以：

Exec ("
select *, 
ROW_NUMBER() OVER ( ORDER BY " + columnName + " ) AS 'Seq'   
from dynamic_table");

如果列名未知：

DECLARE @table_name nvarchar(100) = 'test'
DECLARE @column_name nvarchar(100) 
SELECT 
    @column_name = columns.name
FROM sys.columns
inner join sys.tables ON tables.object_id = columns.object_id
WHERE tables.name = @table_name and column_id = 1

EXEC ('
select *, 
ROW_NUMBER() OVER ( ORDER BY ' + @column_name + ' ) AS ''Seq''   
from ' + @table_name);