Proc SQL in SAS Enterprise Guide 4.3

PROC SQL IN SAS ENTERPRISE GUIDE 4.3Mark TabladilloDecember 12, 2011

(C) 2011 Mark Tabladillo

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About MarkTab Consultant: Data Mining Architect

SAS since 1991 Microsoft MVP this year Presenting and Publishing since 1998

Data Mining Blog http://www.marktab.net

Twitter @marktabnet

http://www.marktab.net/


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Purpose Provide basic vocabulary and pointers

for absolute beginners Challenge intermediate-to-advanced

users


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Outline Basics on Enterprise Guide 4.3 PROC SQL

SQL Clauses Order of Operations – Best Practices Joins – Best Practices Macro variables

(C) 2011 Mark Tabladillo 5

BASICS ON SAS ENTERPRISE GUIDE 4.3


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About SAS Enterprise Guide 4.3 Shipped July 2011 New features include

New Program Editor with Autocomplete and Integrated Syntax Help

Explicit SQL Pass-through Option Macro Variables for Conditional

Processinghttp://support.sas.com/documentation/cdl/en/whatsnew/62580/HTML/default/viewer.htm#egwhatsnew43.htm


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SAS Enterprise Guide 4.3 Tutorial http://support.sas.com/documentation/onlinedoc/guide/tut4

3/en/

http://support.sas.com/documentation/onlinedoc/guide/tut43/en/

http://support.sas.com/documentation/onlinedoc/guide/tut43/en/


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Tutorial Topics


Enterprise Guide is Client Software

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SAS EnterpriseGuide

SASon Windows

SASon Mainframe

SASon UNIX

Code

Results


The SAS Intelligence Platform Architecture

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Enterprise Guide is fully integrated with the servers in the SAS 9 environment.

SAS Enterprise Guide

SAS Workspace Server

SAS Stored Process Server

SAS OLAP Server

SAS Metadata Server


PROC SQLSQL Clauses


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Important in Enterprise Guide


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Autocompletion


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Typical SQL Statement – Six Clauses

SELECT column-1 <, ...column-n>FROM table-1|view-1<, ...table-n|view-n><WHERE expression><GROUP BY column-1 <, ....column-n>><HAVING expression><ORDER BY column-1 <DESC><, ...

Column-n>>;quit;


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How many clauses are required?SELECT column-1 <, ...column-n>

FROM table-1|view-1<, ...table-n|view-n><WHERE expression><GROUP BY column-1 <, ....column-n>><HAVING expression><ORDER BY column-1 <DESC><, ...

Column-n>>;quit;


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What is an example of a column?


Column-n>>;quit;


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What is an example of a table?SELECT column-1 <, ...column-n>


Column-n>>;quit;


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What is an example of an expression?


Column-n>>;quit;


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What does DESC mean?SELECT column-1 <, ...column-n>


Column-n>>;quit;


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MnemonicSELECT column-1 <, ...column-n>

FROM table-1|view-1<, ...table-n|view-n>

<WHERE expression>

<GROUP BY column-1 <, ....column-n>>

<HAVING expression>

<ORDER BY column-1 <DESC><, ... Column-n>>;quit;

SOFEWWORKERSGOHOMEON time!


PROC SQLOrder of Operations – Best Practices


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Order of Operations SQL is a declarative language

You declare the final product Then, the SQL interpreter decides how to

create that final product


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Why try for one SELECT statement?

SQL is a declarative language You declare the final product Then, the SQL interpreter decides how to

create that final product


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Order of OperationsSELECT column-1 <, ...column-n>


Column-n>>;quit;

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3

4

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Best Practices?SELECT column-1 <, ...column-n>


Column-n>>;quit;

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2

3

4

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PROC SQLJoins – Best Practices


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JoinsType DescriptionLEFT JOIN One to ManyRIGHT JOIN Many to OneFULL JOIN Many to Many, with MissingCROSS JOIN ProductUNION JOIN ConcatenationNATURAL JOIN Conservative Matching

Recommended:Sams Teach Yourself SQL in 10 Minutes (3rd Edition) by Ben FortaReference:http://support.sas.com/documentation/cdl/en/proc/61895/HTML/default/viewer.htm#a002473691.htm

http://support.sas.com/documentation/cdl/en/proc/61895/HTML/default/viewer.htm#a002473691.htm

http://support.sas.com/documentation/cdl/en/proc/61895/HTML/default/viewer.htm#a002473691.htm


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Think Through Join Sources SAS can join

SAS Excel Access Oracle Mainframe Text Files


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Best Practice Rules Typed data is better than non-typed Subset better than the whole Native SQL better than SAS SQL In-memory data is faster than disk data Close to the server is better than far

away – subset before moving SAS sources are better than not


PROC SQLMacro Variables


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PROC SQL Makes Macro Variables

SELECT column-1 <, ...column-n>INTO macro-variable-specification

< , ... macro-variable-specification>FROM table-1|view-1<, ...table-n|view-n><WHERE expression><GROUP BY column-1 <, ....column-n>><HAVING expression><ORDER BY column-1 <DESC><, ...

Column-n>>;quit;


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What is a Macro Variable? Text Variable Stores Information in Memory Typically scoped to Global Dynamically Generated

Useful as a prequel to a PROC SQL statement

Useful as an Enterprise Guide 4.3 Condition


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Macro Variables as Conditions


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Defining a Macro Condition


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Process Flow Conditions


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Recommended http://support.sas.com Books

Sams Teach Yourself SQL in 10 Minutes (3rd Edition) by Ben Forta

The Little SAS Book for Enterprise Guide 4.2 by Susan J. Slaughter and Lora D. Delwiche

Professional SAS Programmer's Pocket Reference Sixth Edition by Rick Aster

http://support.sas.com/


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Conclusion Enterprise Guide 4.3 allows for simple

through advanced processing with PROC SQL

Many resources available: Free SAS tutorials Books People

Technology

Proc SQL in SAS Enterprise Guide 4.3