Will anyone help me in this regard. My problem is that when I ajax request WordPress, when I log that response in console it shows error/complete not response.

jQuery(document).ready(function($) {
    $(".pincode_search_field").on('keyup', function(event) {
        event.preventDefault();
        var ajax_url = pin_shop.ajax_url;
        var pincode_search_field = $(this).val();
        var nonce  = $(this).data('nonce');

        $.ajax({
            url: ajax_url,
            type: 'POST',
            dataType: 'json',
            data: {
                'action'        : 'pincode_search_field',
                'nonce'         : nonce,
                'search_query'  : pincode_search_field,
            },
        })
        .done(function(response) {
            console.log(response);
            console.log('success');
        })
        .fail(function() {
            console.log("error");
        })
        .always(function() {
            console.log("complete");
        });

    });
});

Here is my PHP code.

add_action( "wp_ajax_pincode_search_field", 'pincode_search_field' );
add_action( "wp_ajax_nopriv_pincode_search_field", 'pincode_search_field' );

function pincode_search_field() {
    global $wpdb;
    if ( wp_verify_nonce( $_REQUEST['nonce'], "pin_shop_nonce") ) {
        $result['database_result'] = $wpdb->get_results("SELECT ID FROM cs_shop_details WHERE pincode = '192124'");
        $result = json_encode( $result );
        die();
    }
}