これを次のように行う方法は次のselect
とおりです。
update (select id, storea, storeb, storec, AB as new_AB, BC as new_BC, AC as new_AC, ABC as new_ABC
from t join
(select id,
(case when max(storeA) = 1 and max(storeB) = 1 then 1 else 0 end) as AB,
(case when max(storeB) = 1 and max(storeC) = 1 then 1 else 0 end) as BC,
(case when max(storeA) = 1 and max(storeC) = 1 then 1 else 0 end) as AC,
(case when max(storeA) = 1 and max(storeB) = 1 and max(storeC) = 1 then 1 else 0 end) as ABC
from t
group by id
) tsum
on t.id = tsum.id
)
set AB = new_AB, AC = new_AC, BC = new_BC, ABC = new_ABC;
私はこれがうまくいくかもしれないと思います:
select id, storea, storeb, storec, AB, BC, AC, ABC
from t join
(select id,
(case when max(storeA) = 1 and max(storeB) = 1 then 1 else 0 end) as AB,
(case when max(storeB) = 1 and max(storeC) = 1 then 1 else 0 end) as BC,
(case when max(storeA) = 1 and max(storeC) = 1 then 1 else 0 end) as AC,
(case when max(storeA) = 1 and max(storeB) = 1 and max(storeC) = 1 then 1 else 0 end) as ABC
from t
group by id
) tsum
on t.id = tsum.id
)
set AB = new_AB, AC = new_AC, BC = new_BC, ABC = new_ABC;