Codd's Rule

The Codd's are as follows

Rule zero

Rule 1 : Information rule

Rule 2 : Guaranted Access

Rule 3 : Systemetic treatment of NULL

Rule 4 : Active Online Catalog

Rule 5 : Powerful language

Rule 6 : View Updation rule

Rule 7 : Relational Level Operation

Rule 8 : Physical Data Independence

Rule 9 : Logical Data Independence

Rule 10 : Integrity Independence

Rule 11 : Distribution Independence

Rule 12 : Nonsubversion rule

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