Meanwhile, several relational concepts are defined, and the full and necessary condition under which the standard FDs set becomes a minimum cover, and other problems are discussed.
同时，还定义了与它相关的几个概念，讨论了标准FD集f成为最小覆盖的充要条件及其它问题。
Meanwhile, several relational concepts are defined, and the full and necessary condition under which the standard FDs set becomes a minimum cover, and other problems are discussed.
同时，还定义了与它相关的几个概念，讨论了标准FD集f成为最小覆盖的充要条件及其它问题。
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