Permission on crontab & mysql

HI,

I am using centos 6 and finding difficultly in doing 2 below things.

1. i have a user praveen i want to allow him to create cron job of his own. so i have added his user id in cron.allow but still it is not allowing him to edit(even if i have created praveen from root user) or create his cron file name praveen. i have attached the screen shot for the same.

2. i have using mysql and have a database Learning. i want to give access to any user to connect to the same without using root login. how can this be done.

Thanks
PKS

Attached Images

CronTab.png (39.7 KB)