具有固定大小的集合，只是一个拥有可用来防止新增或移除项目的包装函式之集合。

A collection with a fixed size is simply a collection with a wrapper that prevents adding and removing elements.

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预存程序和使用者定义函式，是SQL陈述式和选择性流量控制陈述式的集合，由资料库伺服器储存为某个名称，并视为一个单位进行处理。

Stored procedures and user-defined functions are collections of SQL statements and optional control-of-flow statements stored under a name and processed by the database server as a unit.

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建立新的集合，其元素会将提供的函式套用至每个集合的元素的结果。

Creates a new collection whose elements are the results of applying the given function to each of the elements of the collection.

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