src/Modules/Database/Database.php
public function selectColumn($sql = '', $params = [], $column = 0)
    {
        $result = $this->extendPrepare($sql, $params);
        return $result->fetchAll(parent::FETCH_COLUMN, $column);
    }
public function selectColumn($sql = '', $params = [], $column = 0)
    {
        $result = $this->extendPrepare($sql, $params);
        return $result->fetchAll(parent::FETCH_COLUMN, $column);
    }
@param string $sql
@param array $params
@param integer $column

@return array|false