------解决方案-------------------- insert into b(t) select a.t from a,b where b.t(+)=a.t and b.t is null
------解决方案--------------------
SQL code
表A 有100条记录
表B 有100000000条记录
插入表B中没有的表A记录
更新表B中 存在表A的记录
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insert into b select * from a where id not in (select id from b)
update b set col = a.col from b,a where a.id = b.id