CREATE TABLE ref_product_categories (product_category_description VARCHAR(255), product_category_code VARCHAR(255)); CREATE TABLE products (product_category_code VARCHAR(255), product_description VARCHAR(255))
Find the category descriptions of the products whose descriptions include letter 't'.
    
SQL: SELECT T1.product_category_description FROM ref_product_categories AS T1 JOIN products AS T2 ON T1.product_category_code = T2.product_category_code WHERE T2.product_description LIKE '%t%'