| store_namen | int | +-------------+---------+ product_id is the primary key for this table. Each row in this table indicates the product's price in n different stores. If the product is not available in a store, the price will be null in that store's column. The names of the stores may change from one testcase to another. There will be at least 1 store and at most 30 stores.

Important note: This problem targets those who have a good experience with SQL. If you are a beginner, we recommend that you skip it for now.

Implement the procedure UnpivotProducts to reorganize the Products table so that each row has the id of one product, the name of a store where it is sold, and its price in that store. If a product is not available in a store, do not include a row with that product_id and store combination in the result table. There should be three columns: product_id, store, and price.

The procedure should return the table after reorganizing it.

Return the result table in any order.

The query result format is in the following example.

Examples

Example 1:

Input: 
Products table:
+------------+----------+--------+------+------+
|

Related Tags