它被称为智能"、智能"或串联"" 键.这是个坏主意.它很脆弱，会导致更新问题并阻碍 DBMS.DBMS 和查询语言旨在让您通过基表以一种直接的方式描述您的应用程序.按预期使用它们.

It's called a "smart", "intelligent" or "concatenated" key. It's a bad idea. It is fragile, leads to update problems and impedes the DBMS. The DBMS and query language are designed for you to describe your application via base tables in a straightforward way. Use them as they were intended.