My Experience Codd Rules For Dbms To Qualify As Rdbms.


Content Writer
  • Information Rule: states that entire data along with names and column names is represented in the form of table.
  • Access Rule: states that a particular record can be accessed only through the primary key that is used to uniquely identify a row.
  • View Updating Rule: states that any modification made on the views will be reflected back to the original table thus ensuring the consistency.
  • Language Supportablility Rule: states that there should be a certain language that allows the user to define a table, query and update data set integrity constraints and define transections.
  • Feature of insert, update and delete.
  • Logical data independence
  • Physical data independence
  • Integrity Independence
  • Support to NULL
  • Distributed database feature.
  • Database description rule: states that the description of the database is stored and maintained in the form of table.

Swati Mishra

Content Writer
Exactly codd rule says that columns and the rows are defined in the form of table and the insertion deletion and modification in table is possible