MYSQL Trigger() vs. Delete permanently - php

Question

I have two tables as below:
Table Job_Announcement used to store information about Job, defined as below:
+-----------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+--------------+------+-----+---------+----------------+
| job_id | int(11) | NO | PRI | NULL | auto_increment |
| job_title | varchar(255) | NO | | NULL | |
| category | varchar(255) | NO | | NULL | |
| term | varchar(255) | NO | | NULL | |
| num_experiences | int(11) | NO | | NULL | |
| num_hiring | int(11) | NO | | NULL | |
| Salary | varchar(255) | NO | | NULL | |
| qualification | varchar(255) | NO | | NULL | |
| location | varchar(255) | NO | | NULL | |
| gender | varchar(255) | NO | | NULL | |
| job_content | text | NO | | NULL | |
| job_requirement | varchar(255) | NO | | NULL | |
| publish_date | date | NO | | NULL | |
| close_date | date | NO | | NULL | |
| contact_info | varchar(255) | NO | | NULL | |
| userid | varchar(255) | NO | | NULL | |
| publish | tinyint(1) | NO | | NULL | |
+-----------------+--------------+------+-----+---------+----------------+
And Table job_announcement_deleted, used to store deleted record from table job_announcement
+--------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+--------------+------+-----+---------+----------------+
| job_id | int(11) | NO | PRI | NULL | auto_increment |
| job_title | varchar(255) | NO | | NULL | |
| category | varchar(255) | NO | | NULL | |
| job_content | text | NO | | NULL | |
| publish_date | date | NO | | NULL | |
| close_date | date | NO | | NULL | |
| userid | varchar(255) | NO | | NULL | |
| publish | tinyint(1) | NO | | NULL | |
+--------------+--------------+------+-----+---------+----------------+
In order to move deleted record from job_announcement table to job_announcement_deleted table, I defined trigger definition in phpmyadmin like this:
Trigger Name: before_delete_job
Table: job_announcement
Time: BEFORE
Event: Delete
Definition:
BEGIN
INSERT INTO job_announcement_deleted VALUES(old.job_id,old.job_title,old.category,old.job_content,old.publish_date,old.close_date,old.userid,old.publish);
END
Definer: root#localhost
The trigger event before_delete_job is working fine that the deleted record moved to table job_announcement_deleted.
My problem is if I want to restore deleted record back to table job_announcement, I define similar trigger definition event like above, ex. job_announcement_restore for tale job_announcement_deleted however, how can I do if I want to delete record permanently from job_announcement_deleted? because I want user have options either to restore it or to deleted permanantly.
Thanks.

Answer 1

For the restore just do the reverse process you did for delete (sending data from job_announcement_deleted to job_announcement)
For the perma delete you just have to get the job_id field, since it's auto-incremeneted making it unique for every job.
After you acquire job_id from the user (e.g if he clicks delete from this row you extract job_id from that row), just use DELETE FROM like this :
DELETE FROM job_announcement_deleted WHERE job_id = #job_id
(where #job_id will be the one you acquired earlier in the process)
Also, you shouldn't be sending job_id to the job_announcement_deleted table, since the field is auto-increment, meaning it'll add a new value (incremented by 1 by default) for that field, so there are no duplicates for that field. You just destroy the meaning of auto-increment by doing that, specially since primary key must be a unique value. You could have trouble later on with the database if you get duplicate values for that field, so I suggest you just leave that field unfilled so auto-increment can do it's job.