Why delete query only delete one record - mysql

Question

Hi I’ve got the folowing query:
DELETE tickets, archive, files
FROM tickets
LEFT JOIN ticket_files
ON ticket_files.ticket_id = tickets.ticket_id
LEFT JOIN archive
ON archive.document_id = ticket_files.document_id
LEFT JOIN files
ON files.file_id = ticket_files.file_id
WHERE tickets.ticket_id = 21
When the ticket doesn’t have any record in the junction table ticket_files then the ticket is deleted correctly but if there is more than one record in the ticket_files then only one record is deleted from the tables archive and files. How can i make sure all the joined records are deleted also from archive and files? many thanks
This is the database structure. As you can see the ticket with ID 1 has got two files associated in the ticket_files table but ticket with ID 2 doesn't have any files associated.
-- phpMyAdmin SQL Dump
-- version 5.1.0
-- https://www.phpmyadmin.net/
--
-- Host: localhost:8889
-- Generation Time: Mar 28, 2022 at 07:35 PM
-- Server version: 5.7.34
-- PHP Version: 8.0.8
SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
START TRANSACTION;
SET time_zone = "+00:00";
--
-- Database: `test`
--
-- --------------------------------------------------------
--
-- Table structure for table `archive`
--
CREATE TABLE `archive` (
`document_id` int(11) NOT NULL,
`document_sent_by` int(11) NOT NULL,
`document_description` varchar(255) NOT NULL,
`document_category` int(11) NOT NULL,
`document_status` tinyint(1) NOT NULL DEFAULT '1' COMMENT '1=public 0=draft',
`document_featured` tinyint(1) NOT NULL DEFAULT '0' COMMENT '0=no 1=yes',
`document_note` varchar(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--
-- Dumping data for table `archive`
--
INSERT INTO `archive` (`document_id`, `document_sent_by`, `document_description`, `document_category`, `document_status`, `document_featured`, `document_note`) VALUES
(23, 1, 'File one', 7, 1, 0, 'File one'),
(24, 1, 'File two', 7, 1, 0, 'File two');
-- --------------------------------------------------------
--
-- Table structure for table `files`
--
CREATE TABLE `files` (
`file_id` int(11) NOT NULL,
`file_name` varchar(255) NOT NULL,
`file_type` varchar(255) NOT NULL,
`file_size` varchar(255) NOT NULL,
`file_date` datetime DEFAULT CURRENT_TIMESTAMP,
`file_category` int(11) NOT NULL,
`file_status` tinyint(1) NOT NULL DEFAULT '1' COMMENT '1=public 0=draft',
`file_path` varchar(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--
-- Dumping data for table `files`
--
INSERT INTO `files` (`file_id`, `file_name`, `file_type`, `file_size`, `file_date`, `file_category`, `file_status`, `file_path`) VALUES
(23, '1648496062', 'application/pdf', '9514', '2022-03-02 00:00:00', 7, 1, '/docs/1648496062.pdf'),
(24, '1648496079', 'application/pdf', '146367', '2022-03-09 00:00:00', 7, 1, '/docs/1648496079.pdf');
-- --------------------------------------------------------
--
-- Table structure for table `tickets`
--
CREATE TABLE `tickets` (
`ticket_id` int(11) NOT NULL,
`ticket_sent_by` int(11) NOT NULL,
`building_id` int(11) NOT NULL,
`ticket_subject` varchar(255) NOT NULL,
`ticket_object` text NOT NULL,
`ticket_priority` tinyint(1) NOT NULL,
`ticket_status` tinyint(1) NOT NULL DEFAULT '1' COMMENT '1=aperto 2=lavorazione 3=chiuso',
`ticket_comments` tinyint(1) NOT NULL DEFAULT '1' COMMENT '0=no 1=yes',
`ticket_visibility` tinyint(1) NOT NULL DEFAULT '1' COMMENT '1=public 0=draft',
`ticket_featured` tinyint(1) NOT NULL DEFAULT '0' COMMENT '0=no 1=yes',
`ticket_private` tinyint(1) NOT NULL DEFAULT '0' COMMENT ' 0=no 1=yes ',
`ticket_open_time` datetime DEFAULT CURRENT_TIMESTAMP,
`ticket_edit_time` datetime DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--
-- Dumping data for table `tickets`
--
INSERT INTO `tickets` (`ticket_id`, `ticket_sent_by`, `building_id`, `ticket_subject`, `ticket_object`, `ticket_priority`, `ticket_status`, `ticket_comments`, `ticket_visibility`, `ticket_featured`, `ticket_private`, `ticket_open_time`, `ticket_edit_time`) VALUES
(1, 1, 13, 'Ticket with files', '<p>this ticket has files<br /></p>', 1, 1, 0, 1, 0, 0, '2022-03-28 20:33:59', NULL),
(2, 1, 13, 'Ticket with no files', '<p>ticket with no files<br /></p>', 1, 1, 0, 1, 0, 0, '2022-03-28 20:35:02', NULL);
-- --------------------------------------------------------
--
-- Table structure for table `ticket_files`
--
CREATE TABLE `ticket_files` (
`ticket_id` int(11) NOT NULL,
`document_id` int(11) NOT NULL,
`file_id` int(11) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--
-- Dumping data for table `ticket_files`
--
INSERT INTO `ticket_files` (`ticket_id`, `document_id`, `file_id`) VALUES
(1, 23, 23),
(1, 24, 24);
--
-- Indexes for dumped tables
--
--
-- Indexes for table `archive`
--
ALTER TABLE `archive`
ADD PRIMARY KEY (`document_id`);
--
-- Indexes for table `files`
--
ALTER TABLE `files`
ADD PRIMARY KEY (`file_id`);
--
-- Indexes for table `tickets`
--
ALTER TABLE `tickets`
ADD PRIMARY KEY (`ticket_id`);
--
-- Indexes for table `ticket_files`
--
ALTER TABLE `ticket_files`
ADD KEY `ticket_id` (`ticket_id`),
ADD KEY `document_id` (`document_id`) USING BTREE,
ADD KEY `file_id` (`file_id`);
-- AUTO_INCREMENT for table `archive`
--
ALTER TABLE `archive`
MODIFY `document_id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=25;
--
-- AUTO_INCREMENT for table `files`
--
ALTER TABLE `files`
MODIFY `file_id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=25;
--
-- AUTO_INCREMENT for table `tickets`
--
ALTER TABLE `tickets`
MODIFY `ticket_id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=3;
--
-- Constraints for table `ticket_files`
--
ALTER TABLE `ticket_files`
ADD CONSTRAINT `ticket_files_ibfk_1` FOREIGN KEY (`ticket_id`) REFERENCES `tickets` (`ticket_id`) ON DELETE CASCADE,
ADD CONSTRAINT `ticket_files_ibfk_2` FOREIGN KEY (`document_id`) REFERENCES `archive` (`document_id`) ON DELETE CASCADE,
ADD CONSTRAINT `ticket_files_ibfk_3` FOREIGN KEY (`file_id`) REFERENCES `files` (`file_id`) ON DELETE CASCADE;
COMMIT;

Answer 1

We can add ticket_files to the list of the tables in the DELETE:
select * from ticket_files;
ticket_id | document_id | file_id
--------: | ----------: | ------:
1 | 23 | 23
1 | 24 | 24
DELETE tickets, archive, files, ticket_files
FROM tickets
LEFT JOIN ticket_files
ON ticket_files.ticket_id = tickets.ticket_id
LEFT JOIN archive
ON archive.document_id = ticket_files.document_id
LEFT JOIN files
ON files.file_id = ticket_files.file_id
WHERE tickets.ticket_id = 1
✓
select * from ticket_files;
ticket_id | document_id | file_id
--------: | ----------: | ------:
db<>fiddle here