Categories Questions

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eager loading multi level categories

I have a categories table with parent_id to store categories and subcategories. this categories can be multi level which means a category can have
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WordPress: Get terms from author

On the author archive page i want to show every taxonomy (in my case product category) in which the author has posts (in my case woocommerce
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Excluding category from WP_Query

I'm trying to display a featured post on a custom "class" taxonomy's archive page, and want to exclude posts in the categories with the slug
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Blog Categories

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