join 4 ตารางค่ะ ไม่แสดงในตารางเลยช่วยดูโค้ดให้หน่่อยนะคะ

SELECT company.c_id AS a, worktime.woname, location.loname, companytype.ctname

$c_id=$result[a];

 SELECT company.c_id AS a, company.cname AS b, companytype.ctname AS c, company.caddress AS d, worktime.woname As e, location.loname As f, company.zipcode AS g, company.phone AS h,company.fax AS i
FROM (company INNER JOIN worktime ON company.c_id = worktime.worktimeid) 
    INNER JOIN location ON company.c_id = location.locationid  INNER JOIN companytype ON company.c_id = companytype.ctypeid;";
	echo $sql;
	$db_query=mysql_db_query($db,$sql);
	$result=mysql_fetch_array($db_query);
	$c_id=$result[a];
	$cname=$result;
	$caddress=$result[c];
	$zipcode=$result[d];

	$ctname=$result[e];
	$woname=$result[f];
	$loname=$result[g];
	$phone=$result[h];
	$fax=$result[i];

SELECT c_id, cname, caddress, zipcode,phone, fax, 

companytype.ctname, worktime.woname ,location.loname 

FROM company INNER JOIN companytype ON company.ctypeid 

= companytype.ctypeid INNER JOIN worktime ON 

company.worktimeid = worktime.worktimeid  INNER JOIN 

location ON company.locationid = location.locationid