Sql server 查找具有hierarchyid子节点的所有节点
鉴于此表:Sql server 查找具有hierarchyid子节点的所有节点,sql-server,tsql,hierarchyid,Sql Server,Tsql,Hierarchyid,鉴于此表: CREATE TABLE Employee ( EmpId INT PRIMARY KEY IDENTITY, EmpName VARCHAR(100) NOT NULL, Position HierarchyID NOT NULL ) INSERT INTO Employee (EmpName, Position) VALUES ('CEO', '/'), ('COO', '/1/'), ('CIO', '/2/'), ('CFO'
CREATE TABLE Employee
(
EmpId INT PRIMARY KEY IDENTITY,
EmpName VARCHAR(100) NOT NULL,
Position HierarchyID NOT NULL
)
INSERT INTO Employee (EmpName, Position)
VALUES ('CEO', '/'),
('COO', '/1/'),
('CIO', '/2/'),
('CFO', '/3/'),
('VP Financing', '/3/1/'),
('Accounts Receivable', '/3/1/1/'),
('Accountant 1', '/3/1/1/1/'),
('Accountant 2', '/3/1/1/2/'),
('Accountant 3', '/3/1/1/3/'),
('Accounts Payable', '/3/1/2/'),
('Accountant 4', '/3/1/2/1/'),
('Accountant 5', '/3/1/2/2/'),
('DBA', '/2/1/'),
('VP of Operations', '/1/1/')
如何查找没有任何子节点的所有行
我有以下几点似乎有效,但似乎应该有一种不那么复杂的方法:
select * from (
select
*,
case
when (select top 1 e.Position from dbo.Employee e where Position.GetAncestor(1) = Employee.Position) is null then
cast (0 as bit)
else
cast (1 as bit)
end as HasDescendants
from
dbo.Employee
) as managers
where HasDescendants = 0
请参阅另一个堆栈溢出问题:
请参阅另一个堆栈溢出问题: 查询:
SELECT e.*
FROM dbo.Employee e
WHERE NOT EXISTS (SELECT 0
FROM Employee e2
WHERE e2.Position.ToString() like e.Position.ToString() + '_%')
结果:
| EMPID | EMPNAME | POSITION |
------------------------------------------
| 7 | Accountant 1 | 122,-42,-80 |
| 8 | Accountant 2 | 122,-42,-48 |
| 9 | Accountant 3 | 122,-42,-16 |
| 11 | Accountant 4 | 122,-38,-80 |
| 12 | Accountant 5 | 122,-38,-48 |
| 13 | DBA | 106,-64 |
| 14 | VP of Operations | 90,-64 |
查询:
SELECT e.*
FROM dbo.Employee e
WHERE NOT EXISTS (SELECT 0
FROM Employee e2
WHERE e2.Position.ToString() like e.Position.ToString() + '_%')
结果:
| EMPID | EMPNAME | POSITION |
------------------------------------------
| 7 | Accountant 1 | 122,-42,-80 |
| 8 | Accountant 2 | 122,-42,-48 |
| 9 | Accountant 3 | 122,-42,-16 |
| 11 | Accountant 4 | 122,-38,-80 |
| 12 | Accountant 5 | 122,-38,-48 |
| 13 | DBA | 106,-64 |
| 14 | VP of Operations | 90,-64 |