Problem with time duration code

Question

Hi All,
I have recently set up a database for my website search page and have added some code (please see below) to the page which uploads the data to database so that after 60 days the data is automatically deleted from the database. BUT the data is being deleted before the 60 days is up. Does anyone have any ideas why this might be?
<?php
$con=mysqli_connect("****","*****","****","*****");
// Check connection
if (mysqli_connect_errno())
   echo "Failed to connect to MySQL: " . mysqli_connect_error();
mysqli_query($con,"DELETE FROM donation WHERE dateCreated < DATE_SUB(NOW(), INTERVAL 60 DAY");
mysqli_close($con);
?>
<?php

Answer 1

Ness_quick wrote:
Hi All,
I have recently set up a database for my website search page and have added some code (please see below) to the page which uploads the data to database so that after 60 days the data is automatically deleted from the database. BUT the data is being deleted before the 60 days is up. Does anyone have any ideas why this might be?
<?php
$con=mysqli_connect("****","*****","****","*****");
// Check connection
if (mysqli_connect_errno())
   echo "Failed to connect to MySQL: " . mysqli_connect_error();
mysqli_query($con,"DELETE FROM donation WHERE dateCreated < DATE_SUB(NOW(), INTERVAL 60 DAY");
mysqli_close($con);
?>
<?php
Do you know when the data is getting deleted? At what point after the date it was created?
If you don't get a positive answer I would test it out by switching the dateCreated column temporarily from 'timestamp' to 'date'. Create a few test entries and a few test dates and see what happens. Back up the database file first by exporting it as a .sql file to your desktop. Then if you mess it up you can reload it.
I know for sure that using the combination below with a 'date' column will delete the entry one day after it has expired.
< DATE_SUB(NOW(), INTERVAL 1 DAY");