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我看了这篇文章... http://hashrocket.com/blog/posts/materialized-view-strategies-using-postgresql
作者说:
A materialized view is a snapshot of a query saved into a table.
如果是这样,为什么我们需要物化 View ? 它与从查询插入表有何不同:
insert into items_ver(item_id, item_group, name)
select * from items where item_id=2;