$sql="SELECT *
FROM employee
LEFT JOIN busy ON ( employee.empId = busy.empId )
LEFT JOIN personalcom ON ( employee.empId = personalcom.empId )
LEFT JOIN testcourse ON ( personalcom.testId = testcourse.testId )
LEFT JOIN countcon ON ( employee.empId = countcon.empId )
WHERE inCon != '0'
GROUP by employee.empId
";