The mapping table also allows the user to convert source types to target types, or define constant mappings that set constant values to items in the target schema.
映射表还允许用户将源类型转化成目标类型，或定义常量映射 来将常量设置为目标架构中的项目。
The SQL standard XMLTABLE function provides a straightforward way to provide the set of XPath expressions mapping the XML to desired relational values.
SQL标准xmltable函数提供了一种简单的方法，可以提供一组将XML映射到相应关系值的XPath表达式。
应用推荐