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。
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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