How to create custom form which inserts/updates data in the database made specifically for it.....this can be done easily in PHP file but I'm not able to pull it off in Wordpress. Also, there is no plugin to do so. And, there are a few unsolved queries on this issue in Wordpress forum section.
Need some time to handle deferred joining date by three big IT companies.
If your work is still pending, I'll soon get in touch.