WordPress: SQL Change multiple categories to a custom taxonomy

category-to-taxonomy

UPDATE 
  wp_term_taxonomy tax  
  inner join wp_term_relationships  rel   on  tax.term_taxonomy_id=rel.term_taxonomy_id 
  inner join wp_posts               p	    on  rel.object_id=p.id 
  inner join wp_terms               term	on  tax.term_id=term.term_id 
  set tax.taxonomy='taxonomy-name' 
WHERE 
  p.post_type = 'post' 
AND 
  tax.taxonomy='category'	
AND 
  term.slug IN ('category-one','category-two' 'category-three','category-four')