We have tested the queries below in :

WooCommerce version: 3.5.7
WordPress version: 5.1.1

( Use at own risk )

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Delete all orders woocommerce

DELETE FROM wp_woocommerce_order_itemmeta;

DELETE FROM wp_woocommerce_order_items;

DELETE FROM wp_comments WHERE comment_type = 'order_note';

DELETE FROM wp_postmeta WHERE post_id IN ( SELECT ID FROM wp_posts WHERE post_type = 'shop_order' );

DELETE FROM wp_posts WHERE post_type = 'shop_order';

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delete all products

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';

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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);

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Delete all WooCommerce products (2)

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');

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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;

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delete all categories

DELETE a,c FROM wp_terms AS a

LEFT JOIN wp_term_taxonomy AS c ON a.term_id = c.term_id

LEFT JOIN wp_term_relationships AS b ON b.term_taxonomy_id = c.term_taxonomy_id

WHERE c.taxonomy = 'product_tag';

DELETE a,c FROM wp_terms AS a

LEFT JOIN wp_term_taxonomy AS c ON a.term_id = c.term_id

LEFT JOIN wp_term_relationships AS b ON b.term_taxonomy_id = c.term_taxonomy_id

WHERE c.taxonomy = 'product_cat';

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Delete alle WooCommerce customers / Users

You Can delete alle WooCommerce customers / users with this plugin :

Bulk Delete

Het bericht WooCommerce Delete all Orders, Delete all products, Delete all Customers verscheen eerst op Utilewebsites.