本人编写的SAS 函数技术文档（完整版）。SAS提供了大量的内置函数，并且在数量和内容上不断的发展改进（注：本文所述SAS函数指SAS/BASE模块内的函数）。函数数量的变化非常显著，数量从SAS6.12的二百多个增加到SAS9.2的近五百个。这篇文章前半部分将简单介绍SAS函数的形式和种类，以及SAS系统版本更新过程中数量的变化，对于从SAS9.13升级到SAS9.2后内置函数的数量功能和类型上的变化做详细的介绍，特别会介绍到SAS9.2系统中用户可以自定义函数的情况；后半部分将精选典型类型的常用函数来做实例，你将会在这些例子中得到启示。一旦你学会使用合适的函数，将会使你的工作效率加倍。-I write technical documentation, SAS functions (full version). SAS provides a large number of built-in functions, and in the number and content of the constant development of improvements (Note: SAS functions described in this article refer to SAS/BASE module of the function). Function of the number of very significant changes in the quantity of more than 200 from the SAS6.12 to SAS9.2 nearly 500. This article will briefly introduce the first part of the form of SAS functions and types, as well as the SAS system version number of changes in the update process for the upgrade to SAS9.2 from SAS9.13 after the number of features built-in functions and types in detail on the changes in introduction, in particular, the system will be introduced to SAS9.2 user can customize the function of the situation　the second half will be selected to do the typical examples of the type commonly used functions, you will be inspired by these examples. Once you learn how to use the appropriate function, w