sql_and_relational_theory.pdf

SQL and

Relational Theory

How to Write Accurate SQL Code

SECOND EDITION

C. J. Date

SQL and Relational Theory: How to Write Accurate SQL Code (2 nd edition)

by C. J. Date

Printed in the United States of America.

Published by O’Reilly Media, Inc.,

1005 Gravenstein Highway North, Sebastopol, CA95472.

O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are also

available for most titles ( http://my.safaribooksonline.com ). For more information, contact our corporate/institutional

sales department: (800) 998-9938 or corporate@oreilly.com .

Printing History:

January 2009: First Edition.

December 2011: Second Edition.

Revision History:

2011-12-08 First release

See http://oreilly.com/catalog/errata.csp?isbn= 9781449316402 for release details.

Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of

O’Reilly Media, Inc. SQL and Relational Theory: How to Write Accurate SQL Code and related trade dress are

trademarks of O’Reilly Media, Inc.

Many of the designations used by manufacturers and sellers to distinguish their products are claimed as

trademarks. Where those designations appear in this book, and O’Reilly Media, Inc., was aware of a

trademark claim, the designations have been printed in caps or initial caps.

While every precaution has been taken in the preparation of this book, the publisher and authors assume

no responsibility for errors or omissions, or for damages resulting from the use of the information contained

herein.

ISBN: 978-1-449-31640-2

[LSI]

Those who are enamored of practice without theory are like a

pilot who goes into a ship without rudder or compass

and never has any certainty where he is going

Practice should always be based upon

a sound knowledge of theory.

— Leonardo da Vinci (1452–1519)

The trouble with people is not that they don’t know

but that they know so much that ain’t so.

— Josh Billings (1818–1885)

Languages die...

mathematical ideas do not.

— G. H. Hardy (1877–1947)

Unfortunately, the gap between theory and practice

is not as wide in theory as it is in practice.

— Anon.

These are my principles.

If you don’t like them, I have others.

— Groucho Marx (1890–1977)

There is no royal road to geometry.

— Euclid (c. 365–275 BCE), attrib.

——— ®®®®® ———

To all those who think an exercise like this one is worthwhile,

and in particular to the memory of Lex de Haan,

who is very much missed

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: