Can any one help me how to create an event in MySQL so that it has to be executed for every 10 seconds?
I have tried with the following code but it is inserting only once but when i see whether the event is running of not in process list it is in running state
create event e_insert on schedule at 'timestamp' + interval 1 second do insert into 'table_name' values (now());
You should write -
ON SCHEDULE EVERY '10' SECOND
instead of on schedule at...
Using the Event Scheduler.
Edit:
CREATE EVENT event1
ON SCHEDULE EVERY '10' SECOND
STARTS CURRENT_TIMESTAMP
ON COMPLETION PRESERVE
DO
BEGIN
INSERT INTO...
END
set global event_scheduler = 1;
check this here
Related
Hello I have this table and I want to do a query to be done daily
Select UID from the table where days<31
and update the table set IS_END= 'Y' where days>31 and IS_END ='N'
I have tried to use MYSQL EVENT function but it doesn't work with me.
MySQL Table photo
Hello Ahmed and Welcome to SO.
Actually you can do it via MySQL Event. First you need to enable the event scheduler by:
SET GLOBAL event_scheduler = ON;
Then you can add an event for your update query:
CREATE EVENT
ON SCHEDULE EVERY 1 DAY
STARTS '2018-10-29 00:00:00'
DO
UPDATE <table_name> SET IS_END='Y' WHERE days>31 and IS_END='N';
I'd like to delete a row by ID number from a MySQL database after a specific amount of time have passed since the row was added to the database.
How can I do it? I'm a total beginner :)
Thank you.
CREATE EVENT IF NOT EXISTS `dbName`.`eventName`
ON SCHEDULE
EVERY 1 DAY // or 1 HOUR
COMMENT 'Description'
DO
BEGIN
DELETE FROM `dbName`.`TableName` WHERE `DateCol` < NOW();
END
turn on the event scheduler before using events
SET GLOBAL event_scheduler = ON;
How can i make the following query execute each hour automatically?
SELECT count(*)
FROM user_tab_columns
WHERE table_name='MYTABLE'
Usually in a DBMS exist some schedule of instrument. In Oracle the instrument is DBMS_SCHEDULER.
MySQL same have scheduler. You should check global variable event_scheduler=1. Then you can create schedule:
CREATE EVENT 'new_event'
ON SCHEDULE EVERY 1 HOUR STARTS CURRENT_TIMESTAMP
ON COMPLETION NOT PRESERVE
ENABLE
COMMENT '' DO
call new_proc();
where new_proc() is procedure with your query.
I need to delete rows from table 14 days after the DELETE query has been made. Is it possible to do this using MySQL?
You can use the built-in MySQL Event Scheduler to schedule a query or a stored routine to run at an arbitrary point in time:
This is an example of a minimal CREATE EVENT statement:
CREATE EVENT myevent
ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR
DO
UPDATE myschema.mytable SET mycol = mycol + 1;
Please mind, the Event Scheduler is disabled by default.
I have a problem:
How I can insert a row and delete it X time?
I think something like INSERT the value whit a time stamp and add a task to delete it.
But I don't have idea how to add MySQL task and if here is a better method.
you need to use event scheduler from MySQL:
the basic about MySQL scheduler is:
CREATE EVENT myevent
ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR
DO
UPDATE myschema.mytable SET mycol = mycol + 1;
Source: http://dev.mysql.com/doc/refman/5.1/en/create-event.html
tutorial: http://www.sitepoint.com/how-to-create-mysql-events/
Guide: http://dev.mysql.com/doc/refman/5.1/en/events.html