使用SQL查询从数据库获得DISTINCT结果

Question

I am working in Zend Framework 2. How do I get only unique values for jobtitle from this query??

$jobselect = $jobstable->select()
                        ->setIntegrityCheck(false)
                        ->from($jobsname, array("$jobsname.title as jobtitle", "$jobsname.company as company", "$storagename.storage_path as companylogo", "$jobsname.location as location"))
                        ->join($storagename, "$storagename.parent_id = $jobsname.job_id")    
                        ->where("$storagename.parent_type = ?", "job")
                        ->where("$storagename.type = ?", "thumb.icon")
                        ->where("$jobsname.user_id = ?", 244);

Answer 1

->where("$jobsname.user_id = ?", 244)
-group("jobtitle");