Without these statistics, the database manager could make a decision that would adversely affect the performance of an SQL statement.

如果没有这些统计信息，数据库管理器可能会做出对sql语句的性能产生不利影响的决定。

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With these statistics information database manager could make a decision that would increase the performance of an SQL statement.

数据库管理器通过这些统计信息可以做出决策以提高 SQL 语句的性能。

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Another important factor that affects SQL statement performance is database statistics.

影响sql语句性能的另一个重要因素是数据库统计。

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