SQL 递归枚举子树
示例
WITH RECURSIVE ManagedByJames(Level, ID, FName, LName) AS (
-- start with this row
SELECT 1, ID, FName, LName
FROM Employees
WHERE ID = 1
UNION ALL
-- get employees that have any of the previously selected rows as manager
SELECTManagedByJames.Level+ 1,
Employees.ID,
Employees.FName,
Employees.LName
FROM Employees
JOIN ManagedByJames
ONEmployees.ManagerID= ManagedByJames.ID
ORDER BY 1 DESC -- depth-first search
)
SELECT * FROM ManagedByJames;热门推荐
10 财运虎年祝福语简短语
11 单亲爸爸春节祝福语简短
12 狗狗上厕所训练
13 植物种植祝福语简短
14 翻译考试祝福语朋友简短
15 个人周年庆简短祝福语
16 狗狗怎么训练
17 分别祝福语简短搞笑英文
18 生日广州男生祝福语简短