select product_id,'store1'as store, store1as price

from Products

where store1is not null

select product_id,'store2'as store, store2as price

from Products

where store2is not null

select product_id,'store3'as store, store3as price

from Products

where store3is not null

| 2072|[The Winner University](https://leetcode.com/problems/the-winner-university/)|[Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_2072.sql)|| Easy|

| 2026|[Low-Quality Problems](https://leetcode.com/problems/low-quality-problems/)|[Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_2026.sql)|| Easy|

| 1978|[Employees Whose Manager Left the Company](https://leetcode.com/problems/employees-whose-manager-left-the-company/)|[Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_1978.sql)|| Easy|

| 1795|[Rearrange Products Table](https://leetcode.com/problems/rearrange-products-table/)|[Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_1795.sql)|| Easy|

| 1789|[Primary Department for Each Employee](https://leetcode.com/problems/primary-department-for-each-employee/)|[Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_1789.sql)|| Easy|

| 1757|[Recyclable and Low Fat Products](https://leetcode.com/problems/recyclable-and-low-fat-products/)|[Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_1757.sql)|| Easy|

| 1741|[Find Total Time Spent by Each Employee](https://leetcode.com/problems/find-total-time-spent-by-each-employee/)|[Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_1741.sql)|| Easy|