Delete data after 1 month

[newphpcoder]

Hi...

I have form of uploading data to the database, but I need to delete data after 1 month. how does it possibe.

here is my query of insert data to the database:

$sql = "INSERT INTO sales_order (ProductType,WorkOrder,POIssueDate,SalesMonth) 
      VALUES 
      ('$ProductType','$WorkOrder','$POIssueDate','$SalesMonth')
      ON DUPLICATE KEY UPDATE
      ProductType = '$ProductType', WorkOrder = '$WorkOrder', POIssueDate = '$POIssueDate', SalesMonth = '$SalesMonth'" or die(mysql_error());
      mysql_query($sql, $con);

Should I need to add fields for date upload?

Thank you

[spufi]

If the POIssueDate isn't the date it gets inserted, then you need to add a date for it. If you are on Linux/Unix hosting, you can run a cron job to delete the old data.

[ssystems]

Add another date LastModifiedDateTime defaulting to current timestamp. Run a cron or a windows scheduled task that would delete records you want