<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>Return the ids of all products that were ordered more than three times or supplied more than 80000.

SQL Table Create Statement:
CREATE TABLE Order_Items (product_id VARCHAR, total_amount_purchased INTEGER); CREATE TABLE Product_Suppliers (product_id VARCHAR, total_amount_purchased INTEGER)<|end|><|assistant|><codestart type="sql">SELECT product_id FROM Order_Items GROUP BY product_id HAVING COUNT(*) > 3 UNION SELECT product_id FROM Product_Suppliers GROUP BY product_id HAVING SUM(total_amount_purchased) > 80000</codeend><|end|>