How to perform 1st and 2nd normalization? Explain with example.

anushandilya123

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• May 8th, 2009

For a relation to be in 1st NF the relation should contain atomic attributes only that is they must be single-valued. If its not so break the composite attribute into its parts and for multivalued...

chaitra murthy

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• Feb 16th, 2009

1st Normalization specifies  if and only if all the attributes of the relation R are atomic in nature.Ex: First (Empno, Prjno, Prjname, Noof Hours, Empname)Empno: Employee numberPrjno: Project nu...

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three types,they are object-based logic models,record-based logic models,and physical models.

anushandilya123

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• May 8th, 2009

Data Models:
Object based
Record based

Object Based:
Object Oriented
Entity Relationship Model

Record Based:
Relational
Network
Hierarchical

Culver_lake

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• Mar 22nd, 2006

There are no standards in this area. Authors and theorists make it up as they go. The entity-relationship model (ER) has hundreds of derivitives (bachman, chen, ibm, IDEF1x etc.). the most popular of ...

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