mysql : remove row if parent id match in primary key columan - mysql

Question

Actually, i don't know that what should be the title of the question.
I have two table which schema define as below:
**Table 1 (organization_master)**:
CREATE TABLE `organization_master` ( `organization_id` int(11) NOT NULL, `parent_organization_id` int(11) DEFAULT NULL, `organization_name` varchar(150) NOT NULL, `c_user_id` int(11) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
INSERT INTO `organization_master` (`organization_id`, `parent_organization_id`, `organization_name`, `c_user_id`) VALUES
(119, NULL, 'Patel-Apps', 220),
(183, 119, 'Patel-Apps sub 1', 220),
(184, 119, 'Patel-Apps sub 2', 220),
(250, 247, 'Patel-Apps2', 222);
ALTER TABLE `organization_master` ADD PRIMARY KEY (`organization_id`), ADD KEY `organization_name` (`organization_name`), ADD KEY `c_user_id` (`c_user_id`);
ALTER TABLE `organization_master` MODIFY `organization_id` int(11) NOT NULL AUTO_INCREMENT;
**Table 2 (organization_assigned_user)** :
CREATE TABLE `organization_assigned_user` ( `organization_assigned_user_id` int(11) NOT NULL, `organization_id` int(11) DEFAULT NULL, `user_id` int(11) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `organization_assigned_user` (`organization_assigned_user_id`, `organization_id`, `user_id`) VALUES (29, 250, 219),(30, 250, 220);
ALTER TABLE `organization_assigned_user` ADD PRIMARY KEY (`organization_assigned_user_id`), ADD KEY `user_id` (`user_id`), ADD KEY `organization_id` (`organization_id`);
ALTER TABLE `organization_assigned_user` MODIFY `organization_assigned_user_id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=31;
when i run below query it give me output as below:
SELECT om.organization_id, om.parent_organization_id, om.organization_name FROM `organization_master` AS om LEFT JOIN organization_assigned_user AS oau ON om.organization_id = oau.organization_id WHERE om.c_user_id =220 OR oau.user_id =220 GROUP BY om.organization_id
organization_id parent_organization_id organization_name
119 NULL Patel-Apps
183 119 Patel-Apps sub 1
184 119 Patel-Apps sub 2
250 247 Patel-Apps2
Now, my question is that i don't want the rows which parent_organization_id exists in organization_id column. i.e 199 parent_organization_id exists in organization_id. so my out put should be like like below.
organization_id parent_organization_id organization_name
119 NULL Patel-Apps
250 247 Patel-Apps2

Answer 1

You Can try this
SELECT om.organization_id, om.parent_organization_id, om.organization_name
FROM `organization_master` AS om LEFT JOIN organization_assigned_user AS oau
ON om.organization_id = oau.organization_id
WHERE om.c_user_id =220 OR oau.user_id =220
AND Exists (SELECT 1 FROM `organization_master` o
WHERE o.organization_id = om.organization_id
AND o.parent_organization_id <> om.organization_id)
GROUP BY om.organization_id;