Codd's Rules for Relational Database Management

The following are the 12Codd's rules for Relational Database Management!

If the first 5 are satisfied then the system is considered as a DBMS, and if 6 or more rules are being followed by the system, then it is regarded as an RDBMS!

•The information rule
•The rule of guaranteed access
•The Systematic treatment of all null values
•The database description rule
•Comprehensive data sub language
•The view updating rule
•The insert and update rule
•The physical independence rule
•The logical independence rule
•The integrity independence rule
•The distribution rule
•The Nonsubversion rule