$objectManager = \Magento\Framework\App\ObjectManager::getInstance(); $storeManager = $objectManager->get('Magento\Store\Model\StoreManagerInterface'); $currentStore = $storeManager->getStore(); $resource = $objectManager->get('Magento\Framework\App\ResourceConnection'); $connection = $resource->getConnection(); $tableName = $resource->getTableName('my_table'); // the table name in this example is 'my_table' $sql1 = "SELECT * FROM " . $tableName; $result1 = $connection->fetchAll($sql1); echo '<pre>'; print_r($result1); echo '</pre>'