update a
set principalid =b.principalid
from tablename a,tablename b
where a.areaid=b.areaid
and b.principalid is not null
and a.name<>b.name
set principalid =b.principalid
from tablename a,tablename b
where a.areaid=b.areaid
and b.principalid is not null
and a.name<>b.name
解决方案 »
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