下面列举了一些统计信息，这些统计信息可以帮助给优化器定义数据模型。
Examples of the statistics available which help define the data model to the optimizer include.
当对 SQL 查询进行优化时，SQL 编译器所做出的决定会受到优化器的数据库内容模型的重大影响。
When optimizing SQL queries, the decisions made by the SQL compiler are heavily influenced by the optimizer's model of the database contents.
XMLNSC 验证的性能也在相当大的程度上胜过 MRM 验证，因为新的高性能 XML 解析器的体系结构针对模型驱动的场景进行了优化。
XMLNSC validation considerably out-performs MRM validation too, as the architecture of the new high performance XML parser is optimized for the model-driven scenario.
应用推荐