perl - Fetch data with one row and one column from table using Perl DBI

Question

I am trying to fetch data like (Select 1 from table) which returns data with one row and one column.

I dont want to use $sth->fetchrow_array method to retreive the data in to array. Is there any way to collect the data into scalar variable direclty?

Answer 1

fetchrow_arrayはリストを返します—配列を返すことは不可能です—そしてそれをmy().

my $sth = $dbh->prepare($stmt);
$sth->execute();
my ($var) = $sth->fetchrow_array()
   and $sth->finish();

または、単に使用することもできます

my ($var) = $dbh->selectrow_array($stmt);

Answer 2

my ($value) = @{$dbh−>selectcol_arrayref("select 1 from table")}

またはそれ以上

my ($value) = $dbh−>selectrow_array($statement);