只需替换一下即可尝试一下，
<% @employees = Employee.where("status = ? AND strftime('%d/%m', date_of_birth) = ?", "Active" , date.strftime('%d/%m')) %>用
<% @employees = Employee.where("status = ? AND DATE_FORMAT(date_of_birth,'%d/%m') = ?", "Active" , date.strftime('%d/%m')) %>
