| Describes the basics of using PROC SQL, including retrieving data from single and multiple tables; selecting specific data from tables; subsetting, ordering, and summarizing data; updating tables; combining tables to create new tables and useful reports; performing queries on database management system (DBMS) tables; using PROC SQL with the SAS macro facility; and debugging and optimizing PROC SQL code.
Structured Query Language (SQL) is a standardized, widely used language that retrieves and updates data in relational tables and databases.
A relation is a mathematical concept that is similar to the mathematical concept of a set. Relations are represented physically as two-dimensional tables that are arranged in rows and columns. Relational theory was developed by E. F. Codd, an IBM researcher, and first implemented at IBM in a prototype called System R. This prototype evolved into commercial IBM products based on SQL. The Structured Query Language is now in the public domain and is part of many vendors’ products. |
|
|
 Mastering Web Services SecurityQuickly learn how to build a secure Web services system using available programming tools, models, and specifications
Web services promise to simplify business programming and to improve interoperability, but they won’t deliver on these promises without effective security. Written by the leading security experts in the field, this... | | PC Magazine Guide Windows XP Media Center Edition 2005As much as this book is about how to buy and use a Media Center PC, down deep it is…about how owning one changes the way you watch TV and manage your entertain-ment content. Like all good revolutions, this one empowers you.
One device. One remote. If that isn’t a revolutionary approach to entertainment, what is? Now a former PC... | | Create Great iPhone Photos: Apps, Tips, Tricks, and Effects
You own the world's most versatile, customizable camera: your iPhone. Out of the box, your iPhone camera is no-frills, but you can transform it into a digital darkroom, photo editing suite, and photoblogging tool all rolled into one . . . if you know how to use it.
Create Great iPhone Photos shows you how to... |
|
