此外，还有一组名称浅显易懂的分量抽取函数，只要一个操作就能从日期、时间或时期数据中抽取一个字段。
Also, a set of component extraction functions allows one operation, with a readable name, to get one field out of a date, time, or duration. For example, compare.
基于进入系统的时间，写操作具有幂等性(不管操作多少次结果都不变的性质，比如取绝对值的函数就具有幂等性)和交换性(操作顺序不影响结果，比如加法就具有交换性)。
Write operations are idempotent and commutative, based on the time they enter the system.
IDS现在支持一些新的内置SQL函数，这些函数有的执行常见的数学、类型转换和位图操作，有的操纵字符串、日期和日期时间值
IDS now supports the following new built-in SQL functions to perform common mathematical, casting, and bitmap operations, and for manipulating character string, date, and datetime values
非稳态操作的本质特征就是某变量是时间的函数。
The characteristic property of a transient operation is that something is changing with time.
比如在雇员的对象中，你可以存进他们的雇工号，名字，起始时间，头衔，薪资，特权等等…对象也包括了一些函数(也叫做方法)去操作数据。
So in the case of an employee object, you might store their employee number, name, start date, title, salary, seniority, etc... Objects also include functions (called methods) to handle that data.
执行函数所用的时间，不包括子函数所用的时间和操作系统事件所用的时间。
The time that was spent executing a function and its child functions, excluding time that was spent in operating system events.
对于模块，为模块中的至少一个函数位于调用堆栈上的时间段，其中不包括对操作系统的调用所用的时间。
For a module, the period of time in which at least one function in the module was on the call stack, excluding time that was spent in calls to the operating system.
对于模块，为模块中的至少一个函数位于调用堆栈上的时间段，其中不包括对操作系统的调用所用的时间。
For a module, the period of time in which at least one function in the module was on the call stack, excluding time that was spent in calls to the operating system.
应用推荐