SAS Base Programmer Certification Training by Certified Experts

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INTRODUCTION TO
SAS BASE Software and How it work
BY
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What is SAS?

• A system that delivers the output in a variety of
  easy-to-access formats, like as SAS data sets,
  procedure output files, or HTML. Using Macros
  makes coding in Base SAS. SAS windowing
  environment. Interactive, graphical user
  interface that enables you can easily run SAS and
  test your SAS programs. SAS base code is much
  easier in case the logic of code is very complex.
• A flexible, extensible 4GL and web-based
  interface for data access, transformation and
  reporting

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Who uses SAS?

• SAS Environment is specially design for Data
  Accessing, transfer information and Reporting.
  SAS is including in programming language for data
  manipulation retrieving and storing the
  information, descriptive statistics and report
  writing.

All of the Companies that are using SAS, such as
Computer Software, information technology and
services, Pharmaceuticals, Agriculture, Hospitals
and Health Care, Banking Finance sectors,
Insurance companies, Staffing and Recruiting, For
Higher Educational purpose and Management
consulting.
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Benefits of SAS Base

• Make programming fast and easy. 
• It access industry-standard data security. You
  can encrypt the SAS data on disks, and increase
  security for stored passwords. 
• It combines SAS and Hadoop.You can submit the
  hdfs commands, MapReduce programs and Pig
  language programs from SAS. 
• Increase your computer resources. It improves the
  performance and security. 
• Easily create reports in standard office format
  such as rtfs, pdfs, Microsoft PowerPoint, Html
  and E-book Format and deliver easily to mobile
  devices. 
•  Programmers can read, format, analyze and the
  report on data quickly.

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Work of SAS Base Software

• SAS Base Software is the core of the SAS System.
• Data Step
• The programming language that use to
  manipulate and manage your SAS Data. 
• SAS Environment
• It is an interactive and graphical user interface
  that enables you to easily run SAS and test your
  SAS programs. 
• SAS Procedures
• SAS procedures offer users with a unique ability
  to generate quick results requiring little, if
  any, programming skills. In SAS Procedure some
  software tools for data analysis and reporting.

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Work of SAS Base Software

• Data Step Debugger
• It is a programming tool that helps you
  find logic problems. DATA step programs - When
  you submit a data step with the Debugging option
  Then SAS compiling starts, it displays the
  debugger windows, and pauses until you enter a
  debugger command is to begin execution. You can
  debug only one Data step at a time. You can use
  the debugger only with a DATA step, and not with
  the procedure step.
• Micro facility
• It is a powerful programming tool for
  extending and customize SAS software programs and
  for reducing text in your programs.
• SAS windowing environment
• It is an interactive with
  graphical user interface that enables you to
  easily run SAS and test your SAS programs. You
  can edit and execute programming statement.

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How the Data steps work for SAS?

• The DATA Step statement begins with the process
  of building the SAS data set and names the data
  set. The statements that make the data step
  compiled and execute.
• If the syntax is check hen the data step are
  compiled. If the syntax is correct then the data
  step are executed. A loop of DATA steps is an
  automatic output and return action.

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Flow of Data step
Compiles Syntax Checking
Creates Input buffer
Begins Data Statement
Compilation Phase?
Sets Program Data vector
After you submit the DATA step for execution
process, then SAS checks the syntax of the SAS
statements and compiled, that mean it
automatically translating the statements into
machine code.
Data Read
Close Data Set
No
Yes
Read Input record
Execute Statements
Writes SAS data set
Returns Data step
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Compilation Phase
Compilation Phase

• How To Processing the SAS Code
• Create (input buffer)
• Input buffer is a logical area in memory into
  which SAS reads each record of data from a raw
  data file when the program executes.
• Sets (program data vector)
• It is builds the SAS data set, and one
  observation at a time. When a program executes,
  SAS reads data values from the input buffer. It
  mean by creates them by executing SAS language
  statements. SAS assigns the values to the
  appropriate variables in the program data vector.
  From here, SAS writes the values to a SAS data
  set as a single observation.
• SAS reads a record into the input buffer. SAS
  then reads the values in the input buffer and
  assigns in the program data vector. It also
  calculates the values for variables. The SAS
  program loops back to the top of the DATA step.

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Thank You

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