text: select *
  from da_auto.auto_2015
  
  union all
  
  select *
  from da_auto.auto_2016;
  
  select *
  from da_auto.auto_2015
  
  union
  
  select *
  from da_auto.auto_2016;
  
  select 
  	company
  from da_auto.auto_2015
  
  union
  
  select 
  	company
  from da_auto.auto_2016;