获取父SQL Server变量hierarchyid

Question

如何使用sql by id（EmployeeID）中的hierarchyid类型变量的变量获取表中的父节点？  这是我的表

CREATE TABLE Employee
(
   Node hierarchyid PRIMARY KEY CLUSTERED,
   EmployeeID int UNIQUE NOT NULL,
   EmpName varchar(20) NOT NULL,
   Title varchar(20) NULL
) ;
GO

Answer 1

我找到了解决问题的简单方法：

SELECT EmployeeID 
FROM Employee
WHERE [Node] IN (
               SELECT [Node].GetAncestor(1).ToString()
               FROM Employee
               WHERE EmployeeID=4
               )

感谢您的回答!!!