sql - 从 XML 数据类型中获取字段列表

Question

给定这样的表结构：

DECLARE @Employees TABLE(EmployeeID INT ,EmployeeDetails XML)

INSERT INTO @Employees( EmployeeID ,EmployeeDetails )
VALUES ( 1 ,'<Employee><EmployeeDetails><EmployeeName> Priyanka </EmployeeName><Age> 24 </Age><Address> Argentina</Address></EmployeeDetails></Employee>')

INSERT INTO @Employees
( EmployeeID ,EmployeeDetails )
VALUES ( 2 ,'<Employee><EmployeeDetails><EmployeeName> Sarkar </EmployeeName><Age> 28 </Age><Address> Australia</Address></EmployeeDetails></Employee>')

如何创建查询以获取 EmployeeDetails 标记下的所有标记名称（不是值）的列表？（假设所有记录的结构都相同）。

因此，期望的结果是：

EmployeeName
Age
Address

山姆

Answer 1

尝试这样的事情：

SELECT
    DISTINCT T.C.value('local-name(.)[1]', 'varchar(100)')
FROM @Employees
CROSS APPLY EmployeeDetails.nodes('Employee/EmployeeDetails/*') AS T(C)