Hmm, not so sure about a database. When duplicate entries are allowed, database very often perform relatively poorly. And, more broadly, a hash is vastly faster than a database, so that a database gains an advantage only when the data is so big that it does not fit into a hash.

In brief, an hash of arrays really seems to be what you need.

In reply to Re: What data structure must I use for this problem? by Laurent_R
in thread What data structure must I use for this problem? by Anonymous Monk

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