Stringsql="select m.id,name,mobile,father_id,m.created_at,m.updated_at from merchants as m left join merchant_relation as mr on m.id = mr.child_id where is_own = 'no' and mobile not like '%&%'";
Stringsql="select m.id,name,mobile,father_id,m.created_at,m.updated_at from merchants as m left join merchant_relation as mr on m.id = mr.child_id where is_own = 'no' and mobile not like '%&%' group by mobile";