public function loadColumn($offset = 0)
	{
		// Initialise variables
		$column = [];

		// Execute the query
		if (!$this->execute())
		{
			return null;
		}

		// Get all of the rows from the result set as arrays
		while ($row = $this->fetchArray())
		{
			$column[] = $row[$offset];
		}

		// Free up system resources and return
		$this->freeResult();

		return $column;
	}