You were close. 
# Create an anonymous arrayref
my $arrayref = [1,2,3];

# Create a reference to an existing array
my @array = (1,2,3);
my $arrayref2 = \@array;

# Get a single value from the arrayref:
my $one = $arrayref2->[0];

# Get all the values from the arrayref:
my ($one,$two,$three) = @$arrayref2;

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In the code you posted you wrote: 
[$sql_return]

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Which is putting the arrayref provided by DBI inside another arrayref. Instead do this: 
@$sql_return

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It might help you visualize the data structure if you use Data::Dumper, like this: 
use Data::Dumper;
#...
my $sql_return = $sth_tss->fetchall_arrayref;
print Dumper $sql_return;

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In reply to Re: use of DBI perl function fetchall_arrayref by imp
in thread use of DBI perl function fetchall_arrayref by kmullin5016

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