MySQL: How to create a SQL Job or Event Scheduler for scheduling the Database Task

Anvesh Patel — Thu, 17 Nov 2016 18:28:12 +0000

In this post, I am sharing one of important and basic article about, How to create a SQL Job or scheduler in the MySQL Database Server.

For scheduling the database tasks are very common exercise for all Database Developers and Database Administrators.

The SQL Agent is available in SQL Server and The PG Agent is available in PostgreSQL.

If you want to schedule your database task in MySQL, You should use default Event Scheduler of MySQL Database Server.

You can define event using CREATE EVENT statement and It requires the EVENT privilege for the schema in which the event is to be created.

It might also require the SUPER privilege.

You can access below full demonstration step by step.

Create a sample table:

CREATE TABLE tbl_Students 
(
	StudID INT 
    ,StudName VARCHAR(50)
);

Check the status of Event Variable:

SET GLOBAL event_scheduler = ON;

If it is not enabled, enable it:

SET GLOBAL event_scheduler = ON;

Check the running processes:

SHOW PROCESSLIST;
-- event_scheduler User is running under command "Daemon"

Create an event to insert in tbl_Students at every minute:

CREATE EVENT Eve_tbl_Students_Temp_Insert
ON SCHEDULE EVERY 1 MINUTE
DO
  INSERT INTO tbl_Students 
  VALUES (1,'Anvesh');

Create one more event to test the Delete operation:

CREATE EVENT Eve_tbl_Students_Temp_Delete
ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 MINUTE
DO
  DELETE FROM tbl_Students;

You can also alter the created events:

ALTER EVENT Eve_tbl_Students_Temp_Insert ON SCHEDULE EVERY 2 MINUTE;

You can also disable the events:

ALTER EVENT Eve_tbl_Students_Temp_Insert DISABLE; 
ALTER EVENT Eve_tbl_Students_Temp_Delete DISABLE;

You can also drop the events:

DROP EVENT Eve_tbl_Students_Temp_Insert;
DROP EVENT Eve_tbl_Students_Temp_Delete;

event_scheduler – Database Research & Development