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create view v_vv as
select T1.F11,T2.F23,T3.F32,T4.F41
from T1 a join T2 b on a.F11=b.F21
join T3 c on b.F21=c.F31
join T4 d on c.F31=d.F41
where a.F11=1 ----and (其它条件)
create view v_vv as
select T1.F11,T2.F23,T3.F32,T4.F41
from T1 a join T2 b on a.F11=b.F21
join T3 c on b.F21=c.F31
join T4 d on c.F31=d.F41