To speed searches, you may be able to rearrange your tables and, thus, simplify the underlying queries. table and SQL query optimization are highly dependent on your schema and engine.
要加速搜索，您可以重新安排表，并由此简化底层查询表和SQL查询优化高度依赖于模式和引擎。
Complex query strings, normal form optimization, and the procedural nature of SQL are abstracted via JDO, allowing a development team to focus on the core of their application's persistence needs.
复杂查询字符串、范式优化和SQL的过程性质都通过JDO得以抽象，从而使开发小组可以将精力集中在他们的应用的持久性需求这个核心上。
This optimization feature enables applications to efficiently query XML data through a traditional relational interface with SQL queries.
这种优化特性让应用程序能够使用SQL查询通过传统的关系接口高效地查询XML数据。
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