Remove all WooCommerce products from database via SQL

delete-all-woocommerce-products.php

<?php

require dirname(__FILE__).'/wp-blog-header.php';

$wpdb->query("DELETE FROM wp_terms WHERE term_id IN (SELECT term_id FROM wp_term_taxonomy WHERE taxonomy LIKE 'pa_%')");
$wpdb->query("DELETE FROM wp_term_taxonomy WHERE taxonomy LIKE 'pa_%'");
$wpdb->query("DELETE FROM wp_term_relationships WHERE term_taxonomy_id not IN (SELECT term_taxonomy_id FROM wp_term_taxonomy)");
$wpdb->query("DELETE FROM wp_term_relationships WHERE object_id IN (SELECT ID FROM wp_posts WHERE post_type IN ('product','product_variation'))");
$wpdb->query("DELETE FROM wp_postmeta WHERE post_id IN (SELECT ID FROM wp_posts WHERE post_type IN ('product','product_variation'))");
$wpdb->query("DELETE FROM wp_posts WHERE post_type IN ('product','product_variation')");
$wpdb->query("DELETE pm FROM wp_postmeta pm LEFT JOIN wp_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL");

delete-all-woocommerce-products.sql

-- Remove all attributes from WooCommerce
DELETE FROM wp_terms WHERE term_id IN (SELECT term_id FROM wp_term_taxonomy WHERE taxonomy LIKE 'pa_%');
DELETE FROM wp_term_taxonomy WHERE taxonomy LIKE 'pa_%';
DELETE FROM wp_term_relationships WHERE term_taxonomy_id not IN (SELECT term_taxonomy_id FROM wp_term_taxonomy);
-- Delete all WooCommerce products
DELETE FROM wp_term_relationships WHERE object_id IN (SELECT ID FROM wp_posts WHERE post_type IN ('product','product_variation'));
DELETE FROM wp_postmeta WHERE post_id IN (SELECT ID FROM wp_posts WHERE post_type IN ('product','product_variation'));
DELETE FROM wp_posts WHERE post_type IN ('product','product_variation');
-- Delete orphaned postmeta
DELETE pm
FROM wp_postmeta pm
LEFT JOIN wp_posts wp ON wp.ID = pm.post_id
WHERE wp.ID IS NULL

Thanks!
If you encounter something like Lock wait timeout exceeded; try restarting transaction just execute rows from SQL script one by one.

remove all products and relations

DELETE relations.*, taxes.*, terms.*
FROM wp_term_relationships AS relations
INNER JOIN wp_term_taxonomy AS taxes
ON relations.term_taxonomy_id=taxes.term_taxonomy_id
INNER JOIN wp_terms AS terms
ON taxes.term_id=terms.term_id
WHERE object_id IN (SELECT ID FROM wp_posts WHERE post_type='product');
 
DELETE FROM wp_postmeta WHERE post_id IN (SELECT ID FROM wp_posts WHERE post_type = 'product');
DELETE FROM wp_posts WHERE post_type = 'product';

Remove all products, categories, meta and relations

DELETE relations.*, taxes.*, terms.*
FROM wp_term_relationships AS relations
INNER JOIN wp_term_taxonomy AS taxes
ON relations.term_taxonomy_id=taxes.term_taxonomy_id
INNER JOIN wp_terms AS terms
ON taxes.term_id=terms.term_id
WHERE object_id IN (SELECT ID FROM wp_posts WHERE post_type='product');
 
DELETE FROM wp_postmeta WHERE post_id IN (SELECT ID FROM wp_posts WHERE post_type = 'product');
DELETE FROM wp_posts WHERE post_type = 'product';

DELETE pm FROM wp_postmeta pm LEFT JOIN wp_posts wp ON wp.ID = pm.post_id WHERE wp.ID IS NULL;

delete from `wp_termmeta`
where 
	`term_id` in ( 
		SELECT `term_id`
		FROM `wp_term_taxonomy`
		WHERE `taxonomy` in ('product_cat', 'product_type', 'product_visibility') 
	);

delete from `wp_terms`  
where 
	`term_id` in ( 
		SELECT `term_id`
		FROM `wp_term_taxonomy`
		WHERE `taxonomy` in ('product_cat', 'product_type', 'product_visibility') 
	);
	
DELETE FROM `wp_term_taxonomy` WHERE `taxonomy` in ('product_cat', 'product_type', 'product_visibility');

DELETE meta FROM wp_termmeta meta LEFT JOIN wp_terms terms ON terms.term_id = meta.term_id WHERE terms.term_id IS NULL;

DELETE FROM wp_woocommerce_attribute_taxonomies;

DELETE FROM wp_woocommerce_sessions;

I want to find a way hot to remove all out of stock products in database. I found below code

DELETE p FROM wp_posts p join wp_postmeta pm on p.ID = pm.post_id WHERE p.post_type = 'product' and pm.meta_key='_stock_status' and pm.meta_value='outofstock';

but it shows Unexpected keyword near join.

By the way i'm using mariadb 10

Thank you so much!

Hello @ruscon,
why I get the error "Unexpected keyworkd (near LEFT JOIN)" in the row "DELETE meta FROM wp_termmeta meta LEFT JOIN wp_terms terms ON terms.term_id = meta.term_id WHERE terms.term_id IS NULL;"?

Thanks

@allampatu, @ruscon
I have to insert an empty serialzed array in the row with value "_transient_wc_attribute_taxonomie" from wp_options, otherwise the woocommerce attribute-section complains and import of products with attribute doesn't work.

UPDATE wp_options SET option_value='a:0:{}' WHERE option_name = '_transient_wc_attribute_taxonomies';

Regards, Thomas

This plugin also handles doing this for you:
https://wordpress.org/plugins/woo-product-remover/

Code:
https://plugins.trac.wordpress.org/browser/woo-product-remover/trunk/woo-product-remover.php