I have the table "log" in an SQLite database, where I write all my log files.
However I want to pretend the database from getting to big - and the smartest way in doing this, is by using a trigger on the insert command - at least I think so...
When a new record is inserted, a trigger shall get fired, that deletes all records older than 10 days.
When a new record is inserted, a trigger shall get fired, that deletes all old records, which exceed a specific amount (for example 1000).
I need an example code.
Kind Regards, and thx.
This will create an insert trigger that will delete anything with a create date that is more then 10 days old.
CREATE TRIGGER [TRIGGER_NAME] AFTER INSERT ON my_table BEGIN UPDATE DELETE FROM LOG WHERE DATE(CREATE_DATE) > DATE('now', '-10 days') END
If you want to do something based on size like you were saying with 1000 rows you can do something like this.
CREATE TRIGGER [TRIGGER_NAME] AFTER INSERT ON my_table BEGIN UPDATE DELETE FROM LOG WHERE ROW_NO NOT IN (SELECT TOP 1000 ROW_NO FROM LOG ORDER BY CREATE_DATE DESC) END
This will select the 1000 newest rows and delete anything that is not in that select statement.