SAS (Statistical Analytical System) is driven by the SAS computer program which defines a sequence of operations. This operation has to be performed on data stored as a table which is also known as a database. Although non-programmer GUI to SAS exists is most often merely a front-end that automates or facilitates the generation of SAS programs. The main function of SAS components is intended to be accessed via an application programming interface. This is in the form of statements as well as procedural programming.

SAS - Statistical Analytical System

A SAS program has four major parts and the first is the DATA step. Second is the Procedure steps that include everything that is not enclosed in a DATA step. The third is the Macro language which is considered as a Metaprogramming language. Last is the ODS that is the Output Delivery System statements, which direct any output or data sets. This is created by DATA or procedure steps to any of the various file types and applies styles and templates to the output.

Search Engine Library and Remote Library Services using SAS allow access to data stored in external file data structures. It also allows access to remote computer platforms.

The DATA-step compiler section of an SAS (Statistical Analytical System) executable program assumes a default data file structure. By default, it automates the process of identifying files to the operating system. It is used in opening the input file and reading the next record as well as opening the output file and writing the next record. It is also used in closing the files. This allows the user as well as the programmer to concentrate on the details of working with the data within each record.

All other tasks are accomplished by procedures that operate on the data set and the tasks include printing or performing statistics. It may also require the user/programmer to identify the data set. Procedures cannot have only one behavior, so it allows customization. This has been controlled by mini-languages defined within the procedures. In addition to all this, the SAS (Statistical Analytical System) also has an extensive SQL procedure. This allows SQL programmers to use the system with little additional knowledge. There are also macro programming extensions. This will allow for the rationalization of repetitive sections of the program. Proper imperative programming, as well as procedural programming constructs, can be simulated by the use of the "open code" macros.

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