You can't use the rows method on select statements, only on statements that modify the database. In those cases, for most DBDs $dbh->do($sql) returns the number of rows affected. In other words, you can't use rows to count the rows from a select statement. This is in perldoc DBI in some detail, under the ->rows method.

In reply to Re: SELECT COUNT and DBI: rows by Anonymous Monk
in thread SELECT COUNT and DBI: rows by perleager

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