例子一
-- =============================================
-- 根据EID返回其下属的EID,Layer=1表示直接下属,NULL返回所有下属
-- select EID FROM F_Team_GetSubordinate(2,NULL)
-- =============================================
CREATE FUNCTION F_Team_GetSubordinate(
@EID INT,
@Layer INT)
RETURNS @tb TABLE (EID INT,NameCN varchar(50),SupervisorEID INT,Layer INT)
AS
BEGIN
;WITH CTE AS
(
SELECT EID,NameCn,SupervisorEID,0 as Layer FROM TCFG_Employee WHERE EID=@EID
UNION ALL
SELECT A.EID,A.NameCn,A.SupervisorEID,Layer=layer+1 FROM TCFG_Employee A
JOIN CTE B ON A.SupervisorEID = B.EID
)
INSERT INTO @tb
select EID,NameCN,SupervisorEID,Layer from CTE where (@Layer IS NULL OR Layer=@Layer)
return
END
GO
例子二
--[员工]表含成层级关系
CREATE TABLE Employees (
empid INT NOT NULL,
mgrid INT NULL,--管理者ID字段,用于链接empid
empname VARCHAR (25) NOT NULL,
salary money NOT NULL,
CONSTRAINT PK_Employees PRIMARY KEY (empid),
)
GO
-- 插入实例数据,允许员工的管理者ID字段为null,
INSERT INTO Employees VALUES(1, NULL, \'Nancy\', $10000.00)
INSERT INTO Employees VALUES(2, 1, \'Andrew\', $5000.00)
INSERT INTO Employees VALUES(3, 1, \'Janet\', $5000.00)
INSERT INTO Employees VALUES(4, 1, \'Margaret\',$5000.00)
INSERT INTO Employees VALUES(5, 2, \'Steven\', $2500.00)
INSERT INTO Employees VALUES(6, 2, \'Michael\', $2500.00)
INSERT INTO Employees VALUES(7, 3, \'Robert\', $2500.00)
INSERT INTO Employees VALUES(8, 3, \'Laura\', $2500.00)
INSERT INTO Employees VALUES(9, 3, \'Ann\', $2500.00)
INSERT INTO Employees VALUES(10, 4, \'Ina\', $2500.00)
INSERT INTO Employees VALUES(11, 7, \'David\', $2000.00)
INSERT INTO Employees VALUES(12, 7, \'Ron\', $2000.00)
INSERT INTO Employees VALUES(13, 7, \'Dan\', $2000.00)
INSERT INTO Employees VALUES(14, 11, \'James\', $1500.00)
GO
--Create Departments table and insert demo values
CREATE TABLE Departments (
deptid INT NOT NULL PRIMARY KEY,
deptname VARCHAR (25) NOT NULL,
deptmgrid INT NULL REFERENCES Employees --部门管理者ID,外键参考Employees的empid字段
)
GO
INSERT INTO Departments VALUES (1, \'HR\', 2)
INSERT INTO Departments VALUES (2, \'Marketing\', 7)
INSERT INTO Departments VALUES (3, \'Finance\', 8)
INSERT INTO Departments VALUES (4, \'R&D\', 9)
INSERT INTO Departments VALUES (5, \'Training\', 4)
INSERT INTO Departments VALUES (6, \'