尽管对于少量的数据来说在运行时构建这张表是可能的,但是有些任务则可能会使得程序启动非常缓慢。
While it may make sense to build the table at runtime for such a small set of Numbers, other such tasks may cause program startup to be prohibitively slow.
数据库为一个表格的主键生成值(通过扩展,为相关表生成外主键),从而将程序从这项任务的重担中解放出来。
Having the database generate values for the primary key for a table (and by extension, any foreign key values for related tables) eliminates the burden from the application from having to do so.
此客户机 JAR 文件是在创建 EJB 代理应用程序时由工具创建的(请参见 表 2 中的任务 1)。
This client JAR file was generated by default by the tooling when the EJB proxy application was created (see Task 1 in Table 2).
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