CREATE TABLE Products_in_Events (Product_ID VARCHAR)
CREATE TABLE Products (Product_Name VARCHAR, Product_ID VARCHAR)

Show the names of products that are in at least two events.
SELECT T1.Product_Name FROM Products AS T1 JOIN Products_in_Events AS T2 ON T1.Product_ID = T2.Product_ID GROUP BY T1.Product_Name HAVING COUNT(*) >= 2
SELECT "T1"."Product_Name" FROM "Products" AS "T1" JOIN "Products_in_Events" AS "T2" ON "T1"."Product_ID" = "T2"."Product_ID" GROUP BY "T1"."Product_Name" HAVING COUNT(*) >= 2