selectcol_arrayref is a database handle method, but it can take a statement handle instead of a SQL statement as an argument:

my $sth = $dbh->prepare("select val1 from tb11 where x=?");
...

$dbh->selectcol_arrayref($sth, undef, $x);

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The second argument is the "attributes" hashref, which can cause the method to fetch more than one column, and/or select which column(s) are fetched. See the docs.

In reply to Re: How to use Perl DBI to select just on column of db by runrig
in thread How to use Perl DBI to select just on column of db by lightoverhead

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