By John J. Patrick
SQL for the true World
Don’t simply research “generic” SQL. examine SQL to get effects with the world’s best database platforms–Oracle for the firm and Microsoft entry for the computer. in line with John Patrick’s hands-on SQL direction on the college of California, Berkeley Extension, this ebook indicates precisely the best way to retrieve the knowledge you will have, if you happen to want it, in any application–from advert hoc stories to the information warehouse. completely up to date for the latest models of Oracle, entry, and the SQL typical, this ebook comprises extra routines, suggestions, and ideas than ever sooner than. You’ll study precisely how one can write SQL queries which are effortless to appreciate, be certain, alter, and extend–even if you’ve by no means labored with databases before.
SQL Fundamentals,Third Edition, teaches you the way to
Build uncomplicated statements to retrieve, shop, or regulate data
Craft complicated queries that draw details from a number of tables
Sort and summarize your information simply how you wish it
Create and edit your individual tables
Protect the integrity of your data
Create extra effective, high-performance queries
Work with unions, subqueries, self joins, go joins, internal joins, and outer joins
Use the Oracle facts Dictionary
About the internet Site
The accompanying website, http://groups.google.com/group/sqlfun, includes the entire SQL code and tables from the booklet, together with the total databases for a number of types of entry and code for development the corresponding Oracle databases. It additionally presents suggestions to some of the book’s difficulties and an open zone for discussions with the writer and different readers.
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Additional info for SQL Fundamentals (3rd Edition)
These cells have the same datatype and represent the same type of information. A row is a collection of cells. Together, they represent information about the same object, event, or relationship. A conceptual diagram of a cell. THE PARTS OF A TABLE 15 Notes ■ A cell contains a single piece of data, a single unit of information. ■ Usually a cell contains one of the following types of data: • Text, sometimes one word, or sometimes a one-letter code, such as M for male or F for female • A number • A date and time • A null, which is an unknown value (some people call this an empty cell, or missing data) ■ All the cells in a column contain the same type of information.
SQL is a tool for delivering that information. Notes about SQL ■ SQL is the designated language for getting information from a relational database. ■ SQL says what information to get, rather than how to get it. ■ Basic SQL is easy to learn. ■ SQL empowers people by giving them control over information. ■ SQL allows people to handle information in new ways. ■ SQL makes information powerful by bringing it to people when they need it. 1-2 What is a relational database and why would you use one? A relational database is one way to organize data in a computer.
He or she will be able to think about the concepts, but might have difficulty writing code that works. If a book discusses only one implementation of SQL, it is easy to get distracted by the quirks and special features it has. You also lose sight of the fact that SQL is used in many products, although in slightly different ways. This book compares Oracle and Access because they are two of the most widely used SQL products and because they both run on a PC. They are somewhat different. You will see them side by side.
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