✅MySQL || Beginner level ||Easy to Understand||Simple-Short -Solution✅
Please upvote to motivate me in my quest of documenting all leetcode solutions. HAPPY CODING:)\nAny suggestions and improvements are always welcome.\n==========
**Please upvote to motivate me in my quest of documenting all leetcode solutions. HAPPY CODING:)\nAny suggestions and improvements are always welcome.***\n*====================================================================*\n\u2705 **MySQL Code :**\n```\nSELECT product_id, \'store1\' AS store, store1 AS price \nFROM Products \nWHERE store1 IS NOT NULL\nUNION \nSELECT product_id, \'store2\' AS store, store2 AS price \nFROM Products \nWHERE store2 IS NOT NULL\nUNION \nSELECT product_id, \'store3\' AS store, store3 AS price \nFROM Products \nWHERE store3 IS NOT NULL\n```\n**Runtime:**  495ms\n**Memory Usage:**  0B\n________________________________\n__________________________________\n\nIf you like the solution, please upvote \uD83D\uDD3C\nFor any questions, or discussions, comment below. \uD83D\uDC47\uFE0F
['Union Find', 'MySQL']