Is possible to create a routine or procedure that can automatic everyday check a date in a table.
To be simpler : I want to check if the date on a user have permitions to enter a site and when the date pass want to make the user field activated false.
routine daily
check if (todaydate < dateclient) then
client.activated= false
Thanks for all the help.
Yes, this should be a simple UPDATE query. Something like the following:
UPDATE Client
SET Activated = 'false'
WHERE NOW() < dateclient
You would obviously need to modify this for your schema and then schedule it to run daily using cron or an alternative scheduler of your choice.
Creating the routine is simple enough, but to run it on a daily basis you'll need to wrap it in a cronjob (*nix) or Scheduled Task (Windows). The routine, unfortunately, cannot execute itself - and to the best of my knowledge MySQL server does not possess the ability to run routines at scheduled intervals.
Related
I need to be able to copy data from one table to another on a specific date. I have a list of names that can be altered by a user. However, on a certain date, these need to be locked in and copied to a uneditable table and then mailed to key users.
How would I do this?
Cheers
mysql has trigger.
trigger is like functions which is called on a specific events and cannot be called explicitly. If the event specified occurs, database automatically calls that trigger and does what it supposed to do.
So to do your job, you can write a trigger which will work on your tables and set the date when you want to do your task. Then use if to check the system date is your desired date and if yes do your job.
I used trigger on oracle and never used on mysql but as triggers are using pl/sql, there should be no difference between triggers of oracle and mysql.
PHP has Mail sending options. You can send mail using php.
Let me know if this helps you.
First step would be to create a script in any language, let's say PHP, this script will just connect to the database, and execute the copy queries (grab and insert queries) whenever called.
Then, create a cronjob using Linux to execute the script on the needed schedule.
Sending Emails would be carried out by a similar technique.
Configure a cronjob: setup a cronjob
Copying data using PHP: copying data using php
MySQL implements an event scheduler which can execute mysql stored procedures either once after a specific interval, once at a specific time or repeatedly at a specific interval; that might be of some use to you.
so my question is, what runs the subscribed report in SSRS ? I mean when I subscribe to report and give it a desired time when it should run and send me the file. something does this right ? so I want to know what runs it ? is it a procedure in SQL function ? well the reason why I want to know this is that I want to run SQL update before each time this scheduled report starts.
I can just create procedure that will do the update I want before the scheduled time but, still it will be more practical to integrate it within the job itself
Short answer, these subscriptions are run as database jobs through the SQL Server Agent.
They are created with GUID type names:
The one job step will have a command like:
exec [ReportServer].dbo.AddEvent #EventType='SharedSchedule', #EventData='8df4ff30-97d3-41f7-b3ef-9ce48bfdfbfa'
You can trace these jobs/GUIDs back to the subscription and report through the ReportServer database using the Subscriptions table and its MatchData column (matches the job GUID) and the Catalog table which includes the report data (i.e. linked through the Subscriptions.Report_OID column.
You can use this information to check what's scheduled and based on this schedule your update appropriately.
I haven't tried it myself, but one option could even be to hook into the existing database jobs, but I would approach this with caution; I can't see any issues but maybe it's best not to update any system created jobs like these.
I have to call a store procedure at the end of each month, i just need to know how to fire a trigger on an specific date and time to call my stored procedure.
Thanks for your time.
MySQL can't do this. Instead, you should use a cronjob. If you're on a Linux system, you can create a script or program that runs your stored procedure and schedule it for execution using the crontab command.
In the command line, writing crontab -e will allow you to edit your cronjobs. In here, you can add
0 5 L * ? * /path/to/script.pl
This will run /path/to/script.pl at 5 AM, the last day of every month.
MySQL triggers are responses to query events - the clock ticking is not one of them. If you need to execute something at a specific date/time, use an external job scheduler (e.g. cron) to trigger the job.
As stated in the MySQL docs:
MySQL triggers are activated by SQL statements only.
What you can do is to create an event.
CREATE EVENT event_name
ON SCHEDULE
period_of_time
DO
your_code_here
I would like to ask a question for connoisseurs of SQL (MySQL, to be specific).
I have a table reservation schedules. And when a customer makes a reservation there is a time to let the client to use my service. Therefore, the reservation that he did have to leave the table reservations.
Once the time limit of use is reached, there is some method (trigger,
I believe), which automatically erase the record of this book on the
table?
If so, can someone give me some idea of how to start my search for it, or it is also totally welcome some help as some more advanced lines of code.
There is also the possibility that this only be possible to be implemented via Server-Side (PHP, ASP ...), which does not believe is so true because SQL is a language very complete (to my knowledge).
Edit1: The problem is that I believe this is a task of the DBMS, so I wanted to leave this responsibility to the MySQL The problem is: how?
A trigger is triggered by either before or after an insert , update or delete event (at least in MySQL according to the docs)
What you want is some sort of scheduled job either through your application be it php, asp.net, etc.. or cron job that calls some sort of SQL script.
So to answer, it can't be done purely with triggers.
You can use SQL jobs, but if the removal logic is to complex to manage it with queries I suggest you to use a PHP script that does all that work for you.
Just write down the data check/remove logic in PHP and set up a simple cron operation for it.
The advantage of this solution is that you can access to your scripts/classes/db providers and save your time and your can log all the operations separately (instead of logging to MySQL logs, no matter what script language you are relying on).
If you have a full control of your server the scheduled operation will look like this (if you want to check your DB entries every day at 00:01):
cat /etc/cron.d/php5
0 1 * * * php /path/to/your/script.php >> /path/to/your_script.log
..otherwise you will have to check the control panel of your hosting account and figure out how to manage
You can create one more column in your table where you will create the expiration date. Then you can on your sql server create the job that will erase all records that have expiration date less than curent date.
CREATE EVENT db_name
ON SCHEDULE EVERY 10 SECOND
DO
DELETE FROM myschema.mytable WHERE expiration_date < NOW()
I hope that will help.
I like to update my table every second. I know this is possible in AJAX but is this possible in MySQL query? I found MySQL event, can I get solution from this?
" i wanna check condition **if date_time > now() ** then update status as 1 . is this possible"
it does not seems like you need special status to be setup...
this condition can be checked when data is pulled (if need to be marked execute UPDATE and SELECT when pull),
also it can be done as cron job every minute (not sure can be done every second), however if it very related with user being on page - ajax could be the way to do it and downgrade performance at this same time
It is possible to write an sql query that will set an update status equal to 1 when the date value for that record is out of date, however you will still need a scheduled task to run this sql query from time to time.
If you are able to run code on your server, then you should write up a script that periodically runs your query against the database.
so cron is a scheduler in linux to run anything periodically.
So let's say your script that contains "**if date_time > now() ** then update status as 1" is called updateIfOld.php
then you should make crontab runs "php updateIfOld.php" every second.
Here are the manuals to use crontab: http://www.manpagez.com/man/5/crontab/Ta3HK4KosQPd8aT8BQ&usg=AFQjCNErp1Hz19N7xJwVY1wisQNxmtgpQQ&sig2=D4NQu19AJnBZil9J54V8ww
If you could actually tell a bit more about this situation and why u need this to be done, it will help us to give a better solutions.
With assumptions on what you are trying to achieve , we can give the best.
Anyway sending too many ajax and updating query every second is not an good option.
Here is an idea,
if you can store the expiry time for each row and you can set them set status to 1 where your condition matches.
Anyway i think there must be some reason to change the status to 1 (may be for making them not to display/consider).. If we know the exact reason, i think i can give a better solution..