为数据库返回值的SQL和DataTables。

Now before I ask I KNOW this is WAY OVER MY HEAD! I have no idea how to even begin editing this code. I have been DUMPED in it by some people I was working with and have been left to finish a project by myself! I have the code below and I would like to add in thereNow before I ask I KNOW this is WAY OVER MY HEA