--如何查询子节点和父节点
--创建测试表
CREATE TABLE DetailAccount(
id INT PRIMARY KEY,
parent INT,
balance FLOAT)
CREATE TABLE RollupAccount(
id INT PRIMARY KEY,
parent INT)
INSERT INTO DetailAccount VALUES (3001, 2001, 10)
INSERT INTO DetailAccount VALUES(4001, 3002, 12)
INSERT INTO DetailAccount VALUES(4002, 3002, 14)
INSERT INTO DetailAccount VALUES(3004, 2002, 17)
INSERT INTO DetailAccount VALUES(3005, 2002, 10)
INSERT INTO DetailAccount VALUES(3006, 2002, 25)
INSERT INTO DetailAccount VALUES(3007, 2003, 7)
INSERT INTO DetailAccount VALUES(3008, 2003, 9)
INSERT INTO RollupAccount VALUES(3002, 2001)
INSERT INTO RollupAccount VALUES(2001, 1000)
INSERT INTO RollupAccount VALUES(2002, 1000)
INSERT INTO RollupAccount VALUES(2003, 1000)
INSERT INTO RollupAccount VALUES(1000, NULL)
-- 查询父节点为的余额总数
WITH Rollup
AS
(
select id ,parent from RollupAccount where id = 1000
union all
select r.id,r.parent from RollupAccount as r join Rollup as rp on r.parent = rp.id
)
--select * from Rollup
select sum(balance) as balance
from DetailAccount as d join Rollup as r
on d.parent = r.id
-- 控制树的查询深度
WITH Rollup
AS
(
select id ,parent,0 as depth from RollupAccount where id = 1000
union all
select r.id,r.parent,depth + 1 as depth
from RollupAccount as r join Rollup as rp on r.parent = rp.id
where depth < 1
)
--select * from Rollup
select sum(balance) as balance
from DetailAccount as d join Rollup as r
on d.parent = r.id
--表函数
create function fn_balanceTree(@start int)
returns table
return
WITH Rollup
AS
(
select id ,parent,0 as depth from RollupAccount where id = @start
union all
select r.id,r.parent,depth + 1 as depth
from RollupAccount as r join Rollup as rp on r.parent = rp.id
)
select * from Rollup
--select * from dbo.fn_balanceTree(1000)
--查询父节点
WITH Rollup
AS
(
select id ,parent from RollupAccount where id = 3002
union all
select r.id,r.parent from RollupAccount as r join Rollup as rp on r.id = rp.parent
)
select * from Rollup
select sum(balance) as balance
from DetailAccount as d join Rollup as r
on d.parent = r.id
