Magento Duplicate category

gistfile1.txt

INSERT INTO catalog_category_product
SELECT {{NEWCATEGORY}} as category_id, tablea.product_id, 999 as position
FROM `catalog_category_product`  tablea
LEFT OUTER JOIN `catalog_category_product`  tableb
ON tablea.product_id = tableb.product_id
AND tableb.category_id = {{NEWCATEGORY}}
WHERE tablea.`category_id` = {{OLDCATEGORY}} AND tableb.position is NULL

INSERT INTO catalog_category_product
SELECT 28 as category_id, tablea.product_id, 999 as position
FROM catalog_category_product tablea
LEFT OUTER JOIN catalog_category_product tableb
ON tablea.product_id = tableb.product_id
AND tableb.category_id = 28
WHERE tablea.category_id = 16 AND tableb.position is NULL