Oracle Data Definition Language (DDL). Dr. Bernard Chen Ph.D. University of Central Arkansas Fall 2008. In this lecture. You will learn about Data Definition Language (DDL) statements to work with the structure of an Oracle database table.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Dr. Bernard Chen Ph.D.
University of Central Arkansas
There are two types of constraints:
1.Integrity constraints: define both the primary key and the foreign key with the table and primary key it references.
2. Value constraints: define if NULL values are disallowed, if UNIQUE values are required, and if only certain set of values are allowed in a column.