How often does this sort of task need to be done? If the answer is more than once with similar data then you should seriously consider using a database to do the heavy lifting. To get your eye in take a look at Databases made easy.

Premature optimization is the root of all job security

In reply to Re: Query large tab delimited file by a list by GrandFather
in thread Query large tab delimited file by a list by Elninh05

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