Aggregation Key

What is the Aggregation Key?

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AnithaLetchumi

  • Aug 10th, 2011
 

Aggregation Key is nothing but composite or concatenated key. It's the primary key having more than one column. For example different books may have identical titles, authors. In this case we can take title, author, publication date as the aggregate key which acts as a primary key. The individual column values can be duplicated but together it forms uniqueness.

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