Could a hashing algorithm be used to save space in a database?

Posted by Zubair on Stack Overflow See other posts from Stack Overflow or by Zubair
Published on 2010-05-01T08:45:16Z Indexed on 2010/05/01 8:57 UTC
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I have been using git a lot recently and I quite like the concept of how GIT avoid duplicating similar data by using a hashing function based on sha1. I was wondering if current databases do something similar, or is this inefficient for some reason?

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