根据以上背景，本文通过自主开发和设计实现了基于主机的银行业务系统，并在此基础上提出了查询优化的策略方案。
Based on the above background, this pape designs and achieves a mainframe-based banking system by self-development, then proposes some query optimization strategy based on the system.
根据以上背景，本文通过自主开发和设计实现了基于主机的银行业务系统，并在此基础上提出了查询优化的策略方案。
Based on the above background, this pape designs and achieves a mainframe-based banking system by self-development, then proposes some query optimization strategy based on the system.
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