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The principles of the relational model were first outlined by Dr. E. F. Codd in a June 1970 paper called “A Relational Model of Data for Large Shared Data Banks.” In this paper, Dr. Codd proposed the relational model for database systems. The more popular models used at that time were hierarchical and network, or even simple flat file data structures. Relational database management systems (RDBMS) soon became very popular, especially for their ease of use and flexibility in structure. In addition, there were a number of innovative vendors, such as Oracle, who supplemented the RDBMS with a suite of powerful application development and user products, providing a. | Edition 1.1 M03989 T1001E11 ORACLe Introduction to Oracle SQL and PL SQL Using Procedure Builder Volume One Participant Guide Authors Neena Kochhar Debby Kramer Technical Contributors and Reviewers Christian Bauwens Debra Bowman Lenny Brunson Jackie Collins Ralf Durben Brian Fry Anthony Holbrook Karlene Jensen Sarah Jones Glenn Maslen Sundar Nagarathnam Sandra Schrick Ulrike Schwinn Rosemarie Truman Jenny Tsai Laura Van Deusen Copyright Oracle Corporation 1992 1996. All rights reserved. This documentation contains proprietary information of Oracle Corporation it is provided under a license agreement containing restrictions on use and disclosure and is also protected by copyright law. Reverse engineering of the software is prohibited. If this documentation is delivered to a U.S. Government Agency of the Department of Defense then it is delivered with Restricted Rights and the following legend is applicable Restricted Rights Legend Use duplication or disclosure by the Government is subject to restrictions for commercial computer software and shall be deemed to be Restricted Rights software under Federal law and as set forth in subparagraph c 1 ii of DFARS 252.227-7013 Rights in Technical Data and Computer Software October 1988 . This material or any portion of it may not be copied in any form or by any means without the express prior written permission of the Worldwide Education Services group of Oracle Corporation. Any other copying is a violation of copyright law and may result in civil and or criminal penalties. If this documentation is delivered to a U.S. Government Agency not within the Department of Defense then it is delivered with Restricted Rights as defined in FAR 52.227-14 Rights in Data-General including Alternate III June 1987 . The information in this document is subject to change without notice. If you find any problems in the documentation please report them in writing to Worldwide Education Services Oracle Corporation 500 Oracle Parkway Box 659806 .
