Create 1795.Rearrange-Products-Table.sql

Author: qanhnn12

Easy/1795.Rearrange-Products-Table.sql

@@ -0,0 +1,21 @@
+--MySQL
+SELECT product_id, 'store1' AS store, store1 AS price 
+FROM Products WHERE store1 IS NOT NULL
+
+UNION 
+SELECT product_id, 'store2' AS store, store2 AS price 
+FROM Products WHERE store2 IS NOT NULL
+
+UNION 
+SELECT product_id, 'store3' AS store, store3 AS price 
+FROM Products WHERE store3 IS NOT NULL
+
+ORDER BY 1,2;
+
+--MS SQL Server
+SELECT product_id, store, price
+FROM Products
+UNPIVOT (
+  price FOR store IN (
+    store1,store2,store3)
+        ) AS T;