Execution ERROR: Can't use AVG on a string! called from ./runsql3.sql at 24.
Ah. that changes things -- DBD::CSV is treating the values as strings. Read the Data restrictions section of the docs where it says that DBD::CSV doesn't correctly handle data types, in particular NULLs. If you insert integers, it might happen, that fetch returns a string.

You might want to try DBD::AnyData instead.. Or in the avg() make sure the value is casted to a number so that it's not treated as a string. or finally, you could just select * all the data (6000 rows) and use perl to loop over it once and average everything.

In reply to Re^7: Database processing by davidrw
in thread DBI::st=HASH output by DrAxeman

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