How does mysql inquire about superior and subordinate organizations

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Train of thought:

Custom mysql method

Using two methods of [FIND_IN_SET] [group_concat] in mysql

(1) prepare the test data table CREATE TABLE `org_ test` (`org_ no` varchar (32) NOT NULL COMMENT 'organization number', `org_ name` varchar 'organization name', `pamphorgno` varchar (32) DEFAULT NULL COMMENT 'parent organization number', PRIMARY KEY (`org_ no`)) ENGINE=InnoDB DEFAULT CHARSET=utf8

test data

INSERT INTO `org_ test`VALUES ('1001Qing,' Fujian', null); INSERT INTO `org_ test`VALUES ('100101Qing,' Xiamen', '1001'); INSERT INTO `org_ test`VALUES (' 10010101miles, 'Siming District', '100101'); INSERT INTO `org_ test`VALUES (' 10010102miles, 'Lake District', '100101'); INSERT INTO `org_ test`VALUES (' 10010103miles, 'Tongan District', '100101') INSERT INTO `org_ test` VALUES ('100102,' Fuzhou', '1001'); (2) query all subordinate institutions (including themselves) delimiter $CREATE FUNCTION getOrgChild (orgNo varchar (32)) RETURNS varchar (1000) CHARSET utf8BEGIN-define the temporary variable DECLARE tmpOrg varchar (1000) DEFAULT'' -- Loop query. If orgNo is not empty, then Loop WHILE orgNo IS NOT NULL DO-- splices all query results IF tmpOrg =''THEN SET tmpOrg = CONCAT (tmpOrg, orgNo); ELSE SET tmpOrg = CONCAT (tmpOrg,',', orgNo); END IF -- query data SELECT group_concat (org_no) INTO orgNo FROM org_test WHERE FIND_IN_SET (p_org_no, orgNo) > 0; END WHILE;-- return result RETURN tmpOrg;END $$

Test results:

(3) query all superior institutions of the designated institution (including themselves) delimiter $$CREATE FUNCTION getOrgParent (orgNo varchar (32)) RETURNS varchar (1000) CHARSET utf8BEGIN-define the temporary variable DECLARE tmpOrg varchar (1000) DEFAULT'' -- Loop query. If orgNo is not empty, then Loop WHILE orgNo IS NOT NULL DO-- splices all query results IF tmpOrg =''THEN SET tmpOrg = CONCAT (tmpOrg, orgNo); ELSE SET tmpOrg = CONCAT (tmpOrg,',', orgNo); END IF -- query data SELECT group_concat (p_org_no) INTO orgNo FROM org_test WHERE FIND_IN_SET (org_no, orgNo) > 0; END WHILE;-- return result RETURN tmpOrg;END $$

Test results:

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