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// Get the number of elements SET CI_size = LENGTH(categories_id1) - LENGTH(REPLACE(categories_id1, ',', '')) + 1; WHILE CI_size > 0 DO SET str_CI_el = SUBSTRING_INDEX(str_CI, ',', -1); SET str_CI = SUBSTRING_INDEX(str_CI_el, ',', CI_size - 1); INSERT INTO product_categories1 (product_id,categories_id) VALUES (product_id1, str_CI); SET CI_size = CI_size - 1; END WHILE;
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