convert rows to string in postgresql

Table name is `t1`. Field name is `name1`. name1 has value like this ``` -------------------------------------------+ + name1 + -------------------------------------------- | "a_2013,AcMaster,Master" | | "b_2014,AcMaster,Master" | | "c_2013,a_AcMaster,a_Master" | | "d_2014,a_AcMaster,a_Master" | |__________________________________________| ``` But i want to get reslut like this ``` master acmaster text Master AcMaster a_2013,b_2014 a_Master a_Master c_2013,d_2014 ``` So i try like this ``` select (string_to_array(schemaname,',')) [3] as master,(string_to_array(schemaname,',')) [2] as acmaster,(string_to_array(schemaname,',')) [1] from appsetup.company2 c2,appsetup.company1 c1,appsetup.companygroup cg where c1.compno=c2.compno and cg.compgroupno=c1.compgroupno and c1.compno in (3,2) group by string_to_array(schemaname,',')) [3], (string_to_array(schemaname,',')) [2],cg.compgroupno,schemaname order by cg.compgroupno ``` But its return ``` master acmaster text Master AcMaster ["a_2013","b_2014"] a_Master a_Master ["c_2013","d_2014"] ``` How to get my wanted result? Am using Postgresql 9.3