pseny

i have to tables that are link and i want to view contents of a single item when i select it, what is the correct syntax of using $post in yii ie SELECT tbl_emp.emp_id, tbl_emp.sname, tbl_fname, tbl_educ.empl_id FROM tbl_emp, tbl_edu WHERE tbl_emp.emp_id=$_POST['emp_id'] AND tbl_edc.emp_id=$_PSOT['emp_id'];