外部文件存储更为灵活,但是无法从数据库管理的持久性和完整性中获益。
External file storage is more flexible but does not benefit from database-managed persistency and integrity.
外部数据源可以是另一个 DBMS(数据库管理系统),比如 Oracle 或 SQL Server,也可以仅仅是 Excel 文件。
The external data source could be another DBMS (database management system) like Oracle or SQL Server, or just an Excel sheet.
需求工作产品的外部(例如,通过电子表格、定制数据库或专用的需求管理工具)。
Externally to the requirements work product (e.g., through spreadsheets, customized databases or dedicated requirements management tools).
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