3つのテーブルでのSQLSELECTステートメントの結合

正直言って、私が理解していない質問を理解した場合、あなたは組合を探していますか？

select a,b,c,0 as e,0 as f, test,data from table1
union
select a,b,c,e,f, test,data from table2
union
select a,b,c,0 as e,0 as f, test,data from table3

編集 eとfを含む

edit2 各ユニオンの前にwhere句を追加する必要があります

select a,b,c,0 as e,0 as f, test,data from table1
  where test= 1 and data =1 and id =0
union
select a,b,c,e,f, test,data from table2
  where test= 1 and data =1 and id =0
union
select a,b,c,0 as e,0 as f, test,data from table3
  where test= 1 and data =1 and id =0