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http://psoug.org/reference/codds_rules.html
Oracle Codd's 12 Rules Rule 1: The Information All information in a relational database is represented explicitly at the logical level and in exactly one way - by values in tables.
https://community.oracle.com/thread/394984
dear friend , Oracle is the only database which supports all the code rules(i think 12 rules). here are the 12 codd rules. 1. Information rule Data are represented only one way: as values within columns within rows. Simple, consistent and versatile. The basic requirement of the relational model. 2. Guaranteed access rule Every value can be accessed by providing table name, column name and key.
http://www.geekinterview.com/question_details/17004
They are 12 codd rules which were proposed by E.F.Codd in 1985(published). 11 rules are supported by oracle. The only one rule which is not supported by the oracle is View Updating Rule why because according to codd every view should support full range of data manipulation but here in oracle the formation of view cant be done by one table. such that it requires two tables so there is no possibility …
https://community.oracle.com/thread/623819
Feb 24, 2008 · Is Oracle's new version support all those 12 rules or not? Many Thanks Asif Javaid Chughtai. Software Engineer eVenture Solutions Lahore Pakistan . 4213 Views Tags: 1. Re: Is Oracle Supports all 12 rules of Dr .Ef Ted Codd ... Codd's Rule 3 would seem to rule out the use of the empty string to represent null strings.
https://www.experts-exchange.com/questions/20625591/12-Rules-of-Codd-and-Oracle.html
Hello Experts, Please tell me : Does the Oracle satisfy all the 12 Rules of Codd? What about Access and SQL-Server? How does Access maintain its data-dictionary? Is it accessible by the user as specified by "Information Rule" (1st rule of Codd). Thanks. Sandeep.
http://www.dbasupport.com/forums/showthread.php?22089-EF-CODD-RULES-vs-ORACLE
Mar 08, 2002 · If you check Codd’s 12 rules and apply them in a way that you give 1 point if the DB fulfils the rule, 1/2 point if the DB fulfils the rule partially and 0 point otherwise, then Oracle 8 is top on the market with 8.5 points.
http://www.geekinterview.com/question_details/17056
Oracle satisfies 11.5 of 12 codd's rules. The DML Operations on a complex view is not possible directly. because Oracle only update the Simple view But it will over come INSTEAD OF TRIGGER.
https://www.tutorialspoint.com/dbms/dbms_codds_rules.htm
Rule 7: High-Level Insert, Update, and Delete Rule A database must support high-level insertion, updation, and deletion. This must not be limited to a single row, that is, it must also support union, intersection and minus operations to yield sets of data records.
https://en.wikipedia.org/wiki/Codd%27s_12_rules
Codd's twelve rules are a set of thirteen rules (numbered zero to twelve) proposed by Edgar F. Codd, a pioneer of the relational model for databases, designed to define what is required from a database management system in order for it to be considered relational, i.e., a relational database management system (RDBMS).
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