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File:Relational Algebra Projection Extended.svg

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Captions

Captions

This graphic illustrates the functionality of the relational algebra operation “projection (extended)”.

Summary

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Description
English: This graphic illustrates the functionality of the relational algebra operation “projection (extended)” which can be used to delete, rename, reorder and/or compute attributes. Duplicates are deleted in a set based algebra; in multiset based algebras duplicates have to be deleted explicitly by means of a “DISTINCT” operator.
Date
Source Own work
Author Kowarschick
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This vector image was created with Adobe Illustrator.

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Date/TimeThumbnailDimensionsUserComment
current17:18, 28 April 2019Thumbnail for version as of 17:18, 28 April 2019512 × 281 (14 KB)Kowarschick (talk | contribs)User created page with UploadWizard

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