add 1445

Author: fishercoder1534

README.md

@@ -1096,6 +1096,7 @@ _If you like this project, please leave me a star._ ★
 |1495|[Friendly Movies Streamed Last Month](https://leetcode.com/problems/friendly-movies-streamed-last-month/)|[Solution](../master/database/_1495.sql) || Easy |
 |1435|[Create a Session Bar Chart](https://leetcode.com/problems/create-a-session-bar-chart/)|[Solution](../master/database/_1435.sql) || Easy |
 |1484|[Group Sold Products By The Date](https://leetcode.com/problems/group-sold-products-by-the-date/)|[Solution](../master/database/_1484.sql) || Easy |
+|1445|[Apples & Oranges](https://leetcode.com/problems/apples-oranges/)|[Solution](../master/database/_1445.sql) || Medium |
 |1407|[Top Travellers](https://leetcode.com/problems/top-travellers/)|[Solution](../master/database/_1407.sql) || Easy |
 |1384|[Total Sales Amount by Year](https://leetcode.com/problems/total-sales-amount-by-year/)|[Solution](../master/database/_1384.sql) || Hard |
 |1378|[Replace Employee ID With The Unique Identifier](https://leetcode.com/problems/replace-employee-id-with-the-unique-identifier/)|[Solution](../master/database/_1378.sql) || Easy |

database/_1445.sql

@@ -0,0 +1,2 @@
+--# Write your MySQL query statement below
+select sale_date as SALE_DATE, (o.sold_num - a.sold_num) as DIFF from Sales a join Sales o using(sale_date) group by sale_date order by sale_date