ORACLE-递归查询、树操作

UntifA2023-10-28 12:47

1. 数据准备

sql 复制代码 
-- 测试数据准备
DROP TABLE untifa_test;

CREATE TABLE untifa_test(
  child_id NUMBER(10) NOT NULL, --子id
  title VARCHAR2(50), --标题
  relation_type VARCHAR(10) --关系,
  parent_id NUMBER(10) --父id
);

insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (1, '父菜单1', 'A', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (1, '父菜单1', 'B', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (1, '父菜单1', 'C', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (2, '父菜单2', 'A', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (2, '父菜单2', 'B', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (2, '父菜单2', 'C', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (3, '父菜单3', 'A', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (3, '父菜单3', 'B', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (3, '父菜单3', 'C', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (4, '父菜单4', 'A', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (4, '父菜单4', 'B', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (4, '父菜单4', 'C', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (5, '父菜单5', 'A', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (5, '父菜单5', 'B', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (5, '父菜单5', 'C', 0);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (6, '一级菜单6', 'A', 1);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (7, '一级菜单7', 'B', 1);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (8, '一级菜单8', 'C', 1);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (9, '一级菜单9', 'A', 2);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (10, '一级菜单10', 'B', 2);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (11, '一级菜单11', 'C', 2);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (12, '一级菜单12', 'A', 3);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (13, '一级菜单13', 'B', 3);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (14, '一级菜单14', 'C', 3);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (15, '一级菜单15', 'A', 4);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (16, '一级菜单16', 'B', 4);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (17, '一级菜单17', 'C', 4);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (18, '一级菜单18', 'A', 5);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (19, '一级菜单19', 'B', 5);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (20, '一级菜单20', 'C', 5);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (21, '二级菜单21', 'A', 6);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (22, '二级菜单22', 'B', 6);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (23, '二级菜单23', 'C', 6);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (24, '二级菜单24', 'A', 7);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (25, '二级菜单25', 'B', 7);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (26, '二级菜单26', 'C', 7);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (27, '二级菜单27', 'A', 8);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (28, '二级菜单28', 'B', 8);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (29, '二级菜单29', 'C', 8);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (30, '二级菜单30', 'A', 9);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (31, '二级菜单31', 'B', 9);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (32, '二级菜单32', 'C', 9);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (33, '二级菜单33', 'A', 10);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (34, '二级菜单34', 'B', 10);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (35, '二级菜单35', 'C', 10);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (36, '二级菜单36', 'A', 11);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (37, '二级菜单37', 'B', 11);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (38, '二级菜单38', 'C', 11);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (39, '二级菜单39', 'A', 12);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (40, '二级菜单40', 'B', 12);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (41, '二级菜单41', 'C', 12);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (42, '二级菜单42', 'A', 13);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (43, '二级菜单43', 'B', 13);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (44, '二级菜单44', 'C', 13);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (45, '二级菜单45', 'A', 14);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (46, '二级菜单46', 'B', 14);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (47, '二级菜单47', 'C', 14);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (48, '二级菜单48', 'A', 15);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (49, '二级菜单49', 'B', 15);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (50, '二级菜单50', 'C', 15);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (51, '二级菜单51', 'A', 16);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (52, '二级菜单52', 'B', 16);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (53, '二级菜单53', 'C', 16);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (54, '二级菜单54', 'A', 17);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (55, '二级菜单55', 'B', 17);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (56, '二级菜单56', 'C', 17);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (57, '二级菜单57', 'A', 18);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (58, '二级菜单58', 'B', 18);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (59, '二级菜单59', 'C', 18);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (60, '二级菜单60', 'A', 19);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (61, '二级菜单61', 'B', 19);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (62, '二级菜单62', 'C', 19);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (63, '二级菜单63', 'A', 20);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (64, '二级菜单64', 'B', 20);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (65, '二级菜单65', 'C', 20);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (66, '三级菜单66', 'A', 21);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (67, '三级菜单67', 'B', 21);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (68, '三级菜单68', 'C', 21);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (69, '三级菜单69', 'A', 22);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (70, '三级菜单70', 'B', 22);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (71, '三级菜单71', 'C', 22);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (72, '三级菜单72', 'A', 23);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (73, '三级菜单73', 'B', 23);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (74, '三级菜单74', 'C', 23);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (75, '三级菜单75', 'A', 24);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (76, '三级菜单76', 'B', 24);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (77, '三级菜单77', 'C', 24);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (78, '三级菜单78', 'A', 25);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (79, '三级菜单79', 'B', 25);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (80, '三级菜单80', 'C', 25);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (81, '三级菜单81', 'A', 26);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (82, '三级菜单82', 'B', 26);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (83, '三级菜单83', 'C', 26);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (84, '三级菜单84', 'A', 27);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (85, '三级菜单85', 'B', 27);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (86, '三级菜单86', 'C', 27);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (87, '三级菜单87', 'A', 28);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (88, '三级菜单88', 'B', 28);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (89, '三级菜单89', 'C', 28);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (90, '三级菜单90', 'A', 29);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (91, '三级菜单91', 'B', 29);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (92, '三级菜单92', 'C', 29);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (93, '三级菜单93', 'A', 30);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (94, '三级菜单94', 'B', 30);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (95, '三级菜单95', 'C', 30);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (96, '三级菜单96', 'A', 31);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (97, '三级菜单97', 'B', 31);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (98, '三级菜单98', 'C', 31);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (99, '三级菜单99', 'A', 32);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (100, '三级菜单100', 'B', 32);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (101, '三级菜单101', 'C', 32);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (102, '三级菜单102', 'A', 33);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (103, '三级菜单103', 'B', 33);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (104, '三级菜单104', 'C', 33);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (105, '三级菜单105', 'A', 34);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (106, '三级菜单106', 'B', 34);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (107, '三级菜单107', 'C', 34);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (108, '三级菜单108', 'A', 35);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (109, '三级菜单109', 'B', 35);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (110, '三级菜单110', 'C', 35);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (111, '三级菜单111', 'A', 36);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (112, '三级菜单112', 'B', 36);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (113, '三级菜单113', 'C', 36);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (114, '三级菜单114', 'A', 37);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (115, '三级菜单115', 'B', 37);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (116, '三级菜单116', 'C', 37);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (117, '三级菜单117', 'A', 38);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (118, '三级菜单118', 'B', 38);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (119, '三级菜单119', 'C', 38);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (120, '三级菜单120', 'A', 39);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (121, '三级菜单121', 'B', 39);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (122, '三级菜单122', 'C', 39);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (123, '三级菜单123', 'A', 40);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (124, '三级菜单124', 'B', 40);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (125, '三级菜单125', 'C', 40);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (126, '三级菜单126', 'A', 41);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (127, '三级菜单127', 'B', 41);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (128, '三级菜单128', 'C', 41);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (129, '三级菜单129', 'A', 42);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (130, '三级菜单130', 'B', 42);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (131, '三级菜单131', 'C', 42);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (132, '三级菜单132', 'A', 43);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (133, '三级菜单133', 'B', 43);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (134, '三级菜单134', 'C', 43);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (135, '三级菜单135', 'A', 44);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (136, '三级菜单136', 'B', 44);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (137, '三级菜单137', 'C', 44);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (138, '三级菜单138', 'A', 45);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (139, '三级菜单139', 'B', 45);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (140, '三级菜单140', 'C', 45);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (141, '三级菜单141', 'A', 46);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (142, '三级菜单142', 'B', 46);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (143, '三级菜单143', 'C', 46);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (144, '三级菜单144', 'A', 47);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (145, '三级菜单145', 'B', 47);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (146, '三级菜单146', 'C', 47);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (147, '三级菜单147', 'A', 48);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (148, '三级菜单148', 'B', 48);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (149, '三级菜单149', 'C', 48);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (150, '三级菜单150', 'A', 49);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (151, '三级菜单151', 'B', 49);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (152, '三级菜单152', 'C', 49);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (153, '三级菜单153', 'A', 50);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (154, '三级菜单154', 'B', 50);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (155, '三级菜单155', 'C', 50);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (156, '三级菜单156', 'A', 51);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (157, '三级菜单157', 'B', 51);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (158, '三级菜单158', 'C', 51);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (159, '三级菜单159', 'A', 52);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (160, '三级菜单160', 'B', 52);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (161, '三级菜单161', 'C', 52);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (162, '三级菜单162', 'A', 53);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (163, '三级菜单163', 'B', 53);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (164, '三级菜单164', 'C', 53);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (165, '三级菜单165', 'A', 54);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (166, '三级菜单166', 'B', 54);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (167, '三级菜单167', 'C', 54);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (168, '三级菜单168', 'A', 55);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (169, '三级菜单169', 'B', 55);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (170, '三级菜单170', 'C', 55);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (171, '三级菜单171', 'A', 56);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (172, '三级菜单172', 'B', 56);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (173, '三级菜单173', 'C', 56);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (174, '三级菜单174', 'A', 57);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (175, '三级菜单175', 'B', 57);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (176, '三级菜单176', 'C', 57);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (177, '三级菜单177', 'A', 58);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (178, '三级菜单178', 'B', 58);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (179, '三级菜单179', 'C', 58);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (180, '三级菜单180', 'A', 59);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (181, '三级菜单181', 'B', 59);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (182, '三级菜单182', 'C', 59);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (183, '三级菜单183', 'A', 60);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (184, '三级菜单184', 'B', 60);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (185, '三级菜单185', 'C', 60);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (186, '三级菜单186', 'A', 61);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (187, '三级菜单187', 'B', 61);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (188, '三级菜单188', 'C', 61);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (189, '三级菜单189', 'A', 62);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (190, '三级菜单190', 'B', 62);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (191, '三级菜单191', 'C', 62);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (192, '三级菜单192', 'A', 63);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (193, '三级菜单193', 'B', 63);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (194, '三级菜单194', 'C', 63);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (195, '三级菜单195', 'A', 64);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (196, '三级菜单196', 'B', 64);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (197, '三级菜单197', 'C', 64);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (198, '三级菜单198', 'A', 65);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (199, '三级菜单199', 'B', 65);
insert into untifa_test (CHILD_ID, TITLE, RELATION_TYPE, PARENT_ID)values (200, '三级菜单200', 'C', 65);

1. 树状关系图

2. 语法

SELECT colnum FROM tablename WHERE 条件1

START WITH 条件2

CONNECT BY [NOCYCLE] 条件3（PRIOR 列名1 = 列名2 | 列名1 = PRIOR 列名2 ...）

WHERE 条件1 过滤条件语句，对树状结构遍历后得到的记录进行过滤。

START WITH 条件2 限定条件语句，限定根节点，可以将跟节点限制为1个或多个。

CONNECT BY 条件3（PRIOR 列名1 = 列名2 | 列名1 = PRIOR 列名2） 连接条件语句，其中PRIOR表示的是上一条记录。

NOCYCLE 参数避免进入死循环

比如 CONNECT BY PRIOR child_id = parent_id 表示上一条记录的child_id是本条记录的parent_id，即本条记录的父节点是上一条记录的子节点。

CONNCET BY 说明每行数据是按层次检索，并规定将表中的数据链入树形结构的关系中。

PRIOR在=的左侧，代表左侧的为父节点，否则右侧为父节点，这决定了遍历树的方向。

执行顺序

  1. 根据START WITH 条件2 确定要访问的根节点有哪些
  2. 访问此节点
  3. 判断此节点有无未访问的子节点，若有，则转向最左侧的未被访问的子节点，并执行步骤2、步骤3，否则执行步骤4
  4. 若该节点为根节点，则访问完毕，否则执行步骤5
  5. 返回到此节点的父节点，并执行步骤3
  6. 根据where 条件1 过滤最终遍历树后的查询结果

3. 适用函数

  • LPAD

    LPAD(STR1 =>

    , LEN =>

    , PAD => )

    STR1 准备被填充的字符串，长度不能为空--为空时无效果；

    LEN 填充之后的字符串长度，也就是该函数返回的字符串长度，如果这个数量比原字符串的长度要短，lpad函数将会把字符串截取成从左到右的n个字符

    PAD 填充字符串，是个可选参数，这个字符串是要粘贴到string的左边，如果这个参数未写，lpad函数将会在string的左边粘贴空格

  • LEVEL

    LEVEL 树状关系的层级，根节点的层级始终为1

  • connect_by_isleaf

    此函数用来判断当前节点是否包含下级节点，如果包含的话，说明不是叶子节点，返回0；反之，如果不包含下级节点，这里返回1

  • sys_connect_by_path(colnum,'str')

    此函数将遍历到的路径根据函数中的分隔符，组成一个新的字符串

  • WITH tablename AS () SELECT ... FROM tablename WHERE ...;

    ()中写查询的逻辑，将查询到的结果放入临时表tablename中，再根据条件按需查询

4. 查询案例

4.1 案例1

sql 复制代码 
-- 想要得到从父节点1开始，关系级别是A的所有子节点
SELECT LPAD('#', 2 * (LEVEL - 1) + 1, '-') || t.title,
       LEVEL,
       connect_by_isleaf,
       sys_connect_by_path(t.title || t.relation_type, '/'),
       t.*
  FROM untifa_test t
 START WITH t.child_id = 1
        AND t.relation_type = 'A' -- 限定跟结果集
CONNECT BY NOCYCLE PRIOR t.child_id = t.parent_id
       AND t.relation_type = 'A' -- 限定子节点结果集
 ORDER BY LEVEL;

查询结果：

4.2 案例2

sql 复制代码 
-- 想要得到从子节点66开始，关系级别是A的所有父节点
SELECT LPAD('#', 2 * (LEVEL - 1) + 1, '-') || t.title,
       LEVEL,
       connect_by_isleaf,
       sys_connect_by_path(t.title || t.relation_type, '/'),
       t.*
  FROM untifa_test t
 START WITH t.child_id = 66
        AND t.relation_type = 'A' -- 限定跟结果集
CONNECT BY NOCYCLE t.child_id = PRIOR t.parent_id
       AND t.relation_type = 'A' -- 限定子节点结果集
 ORDER BY LEVEL;

查询结果：

4.3 案例3

sql 复制代码 
-- 将父节点1A的parent_id改为1
UPDATE untifa_test t SET t.parent_id = '1' WHERE t.child_id = '1' AND t.relation_type = 'A';
-- 再查询从父节点1开始，关系级别是A的所有子节点
SELECT LPAD('#', 2 * (LEVEL - 1) + 1, '-') || t.title,
       LEVEL,
       connect_by_isleaf,
       sys_connect_by_path(t.title || t.relation_type, '/'),
       t.*
  FROM untifa_test t
 START WITH t.child_id = 1
        AND t.relation_type = 'A'
CONNECT BY PRIOR t.child_id = t.parent_id
       AND t.relation_type = 'A'
 ORDER BY LEVEL;

查询结果：

这是因为父节点的child_id与parent_id都为1，形成了死循环，所有我们要加入NOCYCLE来规避死循环

sql 复制代码 
SELECT LPAD('#', 2 * (LEVEL - 1) + 1, '-') || t.title,
       LEVEL,
       connect_by_isleaf,
       sys_connect_by_path(t.title || t.relation_type, '/'),
       t.*
  FROM untifa_test t
 START WITH t.child_id = 1
        AND t.relation_type = 'A'
CONNECT BY NOCYCLE PRIOR t.child_id = t.parent_id
       AND t.relation_type = 'A'
 ORDER BY LEVEL;

查询结果：

4.4 案例4

sql 复制代码 
-- 想要得到从子节点66开始，关系级别是A的所有父节点
-- 同案例3一样 CONNECT BY 后面不加 NOCYCLE 则会陷入死循环报错
SELECT LPAD('#', 2 * (LEVEL - 1) + 1, '-') || t.title,
       LEVEL,
       connect_by_isleaf,
       sys_connect_by_path(t.title || t.relation_type, '/'),
       t.*
  FROM untifa_test t
 START WITH t.child_id = 66
        AND t.relation_type = 'A'
CONNECT BY NOCYCLE t.child_id = PRIOR t.parent_id
       AND t.relation_type = 'A'
 ORDER BY LEVEL;

查询结果：

对比案例4与案例2的结果不难发现，在将child_id为1的parent_id从0改为1后，查询结果少了一条，还没弄清楚原因，猜测是因为死循环，过滤掉了parend_id=1和child_id=1的记录，但是不清楚为什么案例3没有过滤掉parend_id=1和child_id=1的记录。

相关推荐
数据库生产实战4 小时前
Oracle 19C RAC下TRUNCATE TABLE的REUSE STORAGE选项作用和风险浅析！
数据库·oracle
小白银子4 小时前
零基础从头教学Linux（Day 60）
linux·数据库·mysql·oracle
瀚高PG实验室5 小时前
数据库安全配置指导
服务器·数据库·瀚高数据库
憋问我，我也不会5 小时前
MYSQL 命令
数据库·mysql
24K老游5 小时前
postgres15 flink cdc同步测试
数据库
无泡汽水6 小时前
MySQL入门练习50题
数据库·mysql
JIngJaneIL6 小时前
助农惠农服务平台|助农服务系统|基于SprinBoot+vue的助农服务系统(源码+数据库+文档)
java·前端·数据库·vue.js·论文·毕设·助农惠农服务平台
云外天ﾉ☼6 小时前
待办事项全栈实现：Vue3 + Node.js (Koa) + MySQL深度整合，构建生产级任务管理系统的技术实践
前端·数据库·vue.js·mysql·vue3·koa·jwt认证
小光学长7 小时前
基于Vue的智慧楼宇报修平台设计与实现066z15wb（程序+源码+数据库+调试部署+开发环境）带论文文档1万字以上，文末可获取，系统界面在最后面。
前端·数据库·vue.js
CodeBlossom7 小时前
Spring Cache快速入门
java·数据库·spring
热门推荐
01GitHub 镜像站点02UV安装并设置国内源03综合整理：pdf预览显示：你尝试预览的文件可能对你的计算机有害。如果你信任此文件以及其来源，请打开此文件以看其内容，如何解决以正常预览文件04Linux下V2Ray安装配置指南05安娜的档案(Anna’s Archive) 镜像网站/国内最新可访问入口（持续更新）06npm使用国内淘宝镜像的方法07BongoCat - 跨平台键盘猫动画工具08《大数据技术原理与应用》实验报告三 熟悉HBase常用操作09NVIDIA显卡驱动、CUDA、cuDNN 和 TensorRT 版本匹配指南10jdk21下载、安装（Windows、Linux、macOS）