小编Gri*_*han的帖子

MySQL中树中的子树

在我的 MYSQL 中Database COMPANY，我有一个Table: Employee递归关联，一个员工可以是其他员工的老板。A self relationship of kind (SuperVisor (1)- SuperVisee (?) ).

创建表的查询：

CREATE TABLE IF NOT EXISTS `Employee` (
  `SSN` varchar(64) NOT NULL,
  `Name` varchar(64) DEFAULT NULL,
  `Designation` varchar(128) NOT NULL,
  `MSSN` varchar(64) NOT NULL, 
  PRIMARY KEY (`SSN`),
  CONSTRAINT `FK_Manager_Employee`  
              FOREIGN KEY (`MSSN`) REFERENCES Employee(SSN)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

我插入了一组元组（查询）：

INSERT INTO Employee VALUES 
 ("1", "A", "OWNER",  "1"),  

 ("2", "B", "BOSS",   "1"), # Employees under OWNER 
 ("3", "F", "BOSS",   "1"), …