RDBMS: Support for large result sets sizing using count query.

RDBMS：支持使用count查询大结果集大小。

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It has quickly been adopted by a large number of software products, and in particular by Relational Database Management Systems (RDBMS).

RBAC很快就被很多软件产品采用，尤其是那些关系数据库管理系统(Relational Database Management Systems, RDBMS)。

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Partition technique provides a good solution to the storage management of large tables in RDBMS.

数据库分区技术为大表的存储管理提供了较优的解决方案。

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