You can extend a data source view by adding calculated columns that are populated by custom expressions, adding new relationships between tables, replacing tables in the data source view with queries, and adding related tables 可以通过以下方式来扩展数据源视图:添加由自定义表达式填充的计算列,在表之间添加新的关系,用查询替换数据源视图中的表以及添加相关表。