Question: In woocommerce I need to display products that are members of 2 categories. I am using the following code:

```
     <?php
        $args = array( 'post_type' => 'product', 'posts_per_page' => 200, 'product_cat' =>         'Washington', 'orderby' => 'rand' );
        $loop = new WP_Query( $args );
         while ( $loop->have_posts() ) : $loop->the_post(); global $product; ?>

```

I would like to display products which are members of both the categories "Washington" and "Small Single"

I do not want to display all products from "Washington", then all products from "Small Single", I would like to display all products which are members of both categories

How would I amend the above code to include the category "Small Single"?

Answer: 
It is possible with `category__and` parameter.

1) USE `Category IDs` of `"Washington" and "Small Single"`

2) In your `$args` Adjust below parameter.(I assume `Washington catId = 2` and `Small Single CatID = 6`)

```
$query = new WP_Query( array( 'category__and' => array( 2, 6 ) ) );

```

3) It will only display Products contained in Both category.

I hope, It will help you!
Had the same requirement, turned out to be very simple

```
<?php
    $args = array(
        'post_type'      => 'product',
        'posts_per_page' => 200,
        'product_cat'    => 'washington+small-single',
        'orderby' => 'rand'
    );
    $loop = new WP_Query( $args );
    while ( $loop->have_posts() ) : $loop->the_post(); global $product;
?>

```