资讯
A database management system (DBMS) that provides both relational and object database management capabilities. See universal server. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction ...
A database that maintains a set of separate, related files (tables), but combines data elements from the files for queries and reports when required. The concept was developed in 1970 by Edgar Codd, ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果