Is (20 million) records a problem for mySQL?

No. However, you (or your DBA) should spend some time planning and benchmarking regarding appropriate storage engines, indexes and backup strategy.

Which perl module will be the fastest and simplest to use?

If you know SQL already and are happy to write that part yourself then DBI would be an obvious first choice.

In reply to Re: MySQL database with a lot of records by hippo
in thread mySQL base with a lot of records by natol44

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