Table schema:
CREATE TABLE products (product_name VARCHAR, product_category_code VARCHAR, color_code VARCHAR); CREATE TABLE ref_colors (color_code VARCHAR, color_description VARCHAR); CREATE TABLE ref_product_categories (product_category_code VARCHAR, unit_of_measure VARCHAR)

Question: Find the product names that are colored 'white' but do not have unit of measurement "Handful".
SQL: SELECT t1.product_name FROM products AS t1 JOIN ref_product_categories AS t2 ON t1.product_category_code = t2.product_category_code JOIN ref_colors AS t3 ON t1.color_code = t3.color_code WHERE t3.color_description = "white" AND t2.unit_of_measure <> "Handful"