04 September 2009

Aggregation

Aggregation - a feature of the entity relationship model that allows a relationship set to participate in another relationship set. This is indicated on an ER diagram by drawing a dashed box around the aggregation.

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6 comments:

  1. Unknown09 April, 2011

    aggregation - a feature of the entity relationship model that allows a relationship set to participate in another relationship set. This is indicated on an ER diagram by drawing a dashed box around the aggregation.

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  2. maulik thumber24 September, 2011

    aggregation is an abstraction through which relationship are treated as higher level entities.

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  3. Milan Hijam06 December, 2011

    thanks for this

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  4. Unknown06 July, 2012

    It is an abstraction through which relationships are treated as high-level entities.

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  5. Unknown10 September, 2012

    thanks friends

    ReplyDelete
  6. Unknown19 April, 2013

    The limitation of ER-model is that it can't represent relationship among relationship, to reduce it we use aggregation.

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