To delete all product attributes in WooCommerce, you typically have two main options: using the WordPress Dashboard or writing a custom SQL query.

Using the WordPress Dashboard

1. Access WooCommerce Attributes:
   • Go to your WordPress Dashboard.
   • Navigate to Products > Attributes.
2. Delete Attributes Individually:
   • Here you’ll see a list of all product attributes.
   • You can delete each attribute by clicking on the “Delete” link below the attribute name.
   • Note: This could be time-consuming if you have many attributes.

Using an SQL Query

If you’re comfortable with SQL and have a large number of attributes, you can use a custom SQL query to delete them. This method is faster but requires caution.

1. Backup Your Database:
   • Before proceeding, ensure you have a complete backup of your WordPress database. Deleting data directly from the database can be risky.
2. Access Your Database:
   • Use a database management tool like phpMyAdmin or a similar tool provided by your hosting service.
3. Run the SQL Query:
   • Execute the following SQL query:
     DELETE FROM wp_term_taxonomy WHERE taxonomy LIKE 'pa_%'; DELETE FROM wp_terms WHERE term_id NOT IN (SELECT term_id FROM wp_term_taxonomy);
   • This query will remove all product attributes (those with ‘pa_’ prefix in taxonomy).
   • Ensure that your table prefix (wp_) matches what is used in your WordPress installation.

Important Notes

• Direct Database Manipulation: Directly manipulating the database can have unintended consequences. Always back up your database before performing such operations.
• Customizations and Integrations: If your WooCommerce site is heavily customized or integrated with other systems, make sure that deleting attributes won’t break any functionality.
• Testing: If possible, perform these operations on a staging or development site first to ensure everything works as expected.

If you’re not comfortable with direct database manipulation, I recommend contacting a professional or using the WordPress Dashboard method, despite its potential time consumption.