By John J. Patrick
ISBN-10: 0137126026
ISBN-13: 9780137126026
SQL for the true World
Don’t simply study “generic” SQL. study SQL to get effects with the world’s best database platforms–Oracle for the firm and Microsoft entry for the computing device. in accordance with John Patrick’s hands-on SQL path on the college of California, Berkeley Extension, this publication exhibits precisely tips to retrieve the information you will want, if you happen to want it, in any application–from advert hoc stories to the knowledge warehouse. completely up-to-date for the latest models of Oracle, entry, and the SQL average, this booklet comprises extra workouts, ideas, and ideas than ever earlier than. You’ll research precisely tips to write SQL queries which are effortless to appreciate, ascertain, adjust, and extend–even if you’ve by no means labored with databases before.
SQL Fundamentals,Third Edition, teaches you the way to
Build easy statements to retrieve, shop, or alter data
Craft advanced queries that draw info from a number of tables
Sort and summarize your information simply how you wish it
Create and edit your personal tables
Protect the integrity of your data
Create extra effective, high-performance queries
Work with unions, subqueries, self joins, pass 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 all of the SQL code and tables from the publication, together with the complete databases for a number of types of entry and code for development the corresponding Oracle databases. It additionally offers options to the various book’s difficulties and an open quarter for discussions with the writer and different readers.
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Extra resources for SQL Fundamentals (3rd Edition)
Example text
They are a good way to present a lot of information in a very condensed format. The tables in a relational database are very similar to these tables, which we all understand and use every day. All the information in a relational database is kept in tables. There is no other type of container to keep it in — there are no other data structures. Even the most complex information is stored in tables. Someone once said that there are three types of data structures in a relational database: tables, tables, and tables.
Because the table of constants has only one row, it does not need a primary key. l_lunches table LUNCH_ID LUNCH_DATE EMPLOYEE_ID DATE_ENTERE --------- ----------- ----------- ----------1 16-NOV-2011 201 13-OCT-2011 2 16-NOV-2011 207 13-OCT-2011 3 16-NOV-2011 203 13-OCT-2011 4 16-NOV-2011 204 13-OCT-2011 6 16-NOV-2011 202 13-OCT-2011 7 16-NOV-2011 210 13-OCT-2011 8 25-NOV-2011 201 14-OCT-2011 9 25-NOV-2011 208 14-OCT-2011 12 25-NOV-2011 204 14-OCT-2011 13 25-NOV-2011 207 18-OCT-2011 15 25-NOV-2011 205 21-OCT-2011 16 05-DEC-2011 201 21-OCT-2011 17 05-DEC-2011 210 21-OCT-2011 20 05-DEC-2011 205 24-OCT-2011 21 05-DEC-2011 203 24-OCT-2011 22 05-DEC-2011 208 24-OCT-2011 The l_lunches table registers an employee to attend a lunch.
16 Most tables are tall and thin. . . . . . . . . . . . . . . . . . . 18 Examples of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1-12 An example of a table in Oracle and Access . . . . . . . . . . . . . 19 1-13 Some design decisions in the l_employees table . . . . . . . . . 22 1-14 The Lunches database . . . . . . . . . . . . . . . . . . . . . 23 Key Points . . .
SQL Fundamentals (3rd Edition) by John J. Patrick
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