select a.First_Name, a.Last_Name, a.Address, a.User_Name, c,Status, b.University from User_Info a, Admission_Code b, Univ_Code c, User_Admission_Status d where a.User_Name=d.User_Name and b.Code=d.Admission_Code and c.Code=d.Univ_Code;

I didn't try this but the logic sound right this way

Try This one