These applications serve to process user data and treat every request as an important unit of work with a well-defined transaction lifecycle.

这些应用程序用来处理用户的数据，并且将每一个请求都作为一个重要的带有明确事务生命周期的工作单元。

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In cases where the unit of measure is user-defined, you must define the period. The following are some examples of periods in use.

在用户定义的测量单位的情况下，必须定义这个周期。

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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.

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。

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