A SAS statement is a string of SAS keywords, SAS names, special characters, and operators that instructs SAS to perform an operation or that gives information to SAS. Each SAS statement ends with a semicolon. SAS 9.3 Statement References 2. Options Options就是SAS中的选项，用来修饰Statements， 主要告诉SAS怎样进行这些操作。
