Display Magento 2 SQL queries

vendor_magento_zendframework1_library_Zend_Db_Adapter_Pdo_Abstract.php

<?php
/*
Edit file vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php
and add the following code at line 237
*/

$sqlQuery = $sql;
if (is_string(key($bind))) {
    foreach ($bind as $field => $value) {
        $sqlQuery = str_replace($field, $this->quote($value), $sqlQuery);
    }
} else if (is_numeric(key($bind))) {
    $offset = 0;
    foreach ($bind as $value) {
        $pos = strpos($sqlQuery, '?', $offset);
        if (null === $value) {
            $value = 'NULL';
        } else if (is_string($value)) {
            $value = $this->quote($value);
        }
        $sqlQuery = substr_replace($sqlQuery, $value, $pos, 1);
        $offset = $pos + strlen($value);
    }
}
echo '<pre>';print_r($sqlQuery);echo '</pre>';