Pilih semua data termasuk tabel lain meskipun null

coba ini

   SELECT e.employeeId,e.firstName,e.lastName,s.ShoeName,s.ShoeColor,s.ShoeBrand 
   FROM    Employee e
   LEFT JOIN Shoe s
   ON e.employeeID = s.Employee_employeeID

DEMO SQLFIDDLE DI SINI