In this paper, we offer a segmented query executive plan which is based on bushy tree model.
该文以丛生树模型为基础，提出了一种片段式查询执行计划。
The basic optimization methods of the SQL query language is presented by comprehending executive tactics of RDBMS optimizer and analyzing the factors that affect the SQL query languages efficiency.
介绍RDBMS优化器的执行策略和分析了影响SQL查询效率的因素的基础上，提出了优化SQL查询效率的基本方法，以提高数据库查询的执行效率。
Searching an optimized executive strategy for every complex query is the key of success for database development. In database field, it is still an N-P problem.
对于一个复杂的查询，寻找一个优化的执行策略是数据库系统开发成功的关键所在，此项研究目前在数据库领域仍属于N - P问题。
The database optimizer provides an optimal executive strategy for database query.
数据库优化器为数据库查询提供一个最佳的执行策略。
The basic optimization methods of the SQL query language is presented by comprehending executive tactics of RDBMS optimizer and analyzing the factors that affect the SQL query language efficiency.
通过了解rdbms优化器的执行策略，并分析了影响SQL查询语句效率的因素，提出了SQL查询语句的基本优化方法，充分利用这些方法能提高SQL查询语句的执行效率。
The basic optimization methods of the SQL query language is presented by comprehending executive tactics of RDBMS optimizer and analyzing the factors that affect the SQL query language efficiency.
通过了解rdbms优化器的执行策略，并分析了影响SQL查询语句效率的因素，提出了SQL查询语句的基本优化方法，充分利用这些方法能提高SQL查询语句的执行效率。
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