Nrows - Number of rows in the table.

nrows -表中的行数。

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npused - Number of pages used to store 'nrows' of Tupule

npused - 用于存储 Tupule 的 ‘nrows’ 的页数

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Statistics have been updated, and not only is nrows populated but we also see when statistics were last updated.

统计信息已被更新，不但填充了 nrows，而且我们还看到统计信息最终被更新了。

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