Refresh constraints

 

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Constraints are one of the fundamental concepts, which arrive at a very elementary stage of Database designing. Constraints are nothing but the rules on the data. This preserves the Entity integrity, Referential Integrity, and Domain Integrity of the data. While entity integrity focusses on uniqueness and NULLable property of a data, referential checks the data of a column ‘in reference to’ its parent column. Domain integrity defines a domain set for a column.

 They are imposed upon the table columns, where they act as barrier for the incoming data. Once the checks are activated, only the obedient data is allowed to grab the seat. System raises the ‘Violating’ exception, if the data fails the constraint rule.

My obligations to DBANotes.com, who published the content. Read the complete paper at the below link.

 http://www.dbanotes.com/database-development/understanding-oracle-11g-constraints/

Do post your feedback/comments/queries.

Saurabh

 

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OakTable User Account

Hi,

Today, my user account at OakTable network(http://www.oaktable.net) has been approved. Just to share with you all, I am happy to be the subscribed user of OakTable N/W.

Thanks OakTable and Thanks all

SBH

Oracle 11g SecureFiles

Oracle Databases
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Hi All,

Oracle 11g saw through very significant PL/SQL feature i.e. Storage of external files/objects. These objects fall under unstructured data category and database recognises them as Large Objects. They are stored as LOB types in database. This normal storage was improved upon, after this philosophy slowly moved from ‘featured one’ to ‘overhead’ level in terms of application performance and security.

My obligations to Exforsys Inc, who have published my article on the usage of Oracle 11 Secure Files. Find the complete story at the link given below.

http://www.exforsys.com/tutorials/oracle-11g/oracle-11g-securefiles.html

Surely for the readers, come up with your comments, feedbacks and queries. I shall be thankful.

Bye, SBH