Create 1543. Fix Product Name Format.sql

Author: ZihanWan97

Easy/1543. Fix Product Name Format.sql

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+Table: Sales
+
++--------------+---------+
+| Column Name | Type |
++--------------+---------+
+| sale_id | int |
+| product_name | varchar |
+| sale_date | date |
++--------------+---------+
+sale_id is the primary key for this table.
+Each row of this table contains the product name and the date it was sold.
+ 
+
+Since table Sales was filled manually in the year 2000, product_name may contain leading and/or trailing white spaces, also they are case-insensitive.
+
+Write an SQL query to report
+
+product_name in lowercase without leading or trailing white spaces.
+sale_date in the format ('YYYY-MM').
+total the number of times the product was sold in this month.
+Return the result table ordered by product_name in ascending order. In case of a tie, order it by sale_date in ascending order.
+
+The query result format is in the following example.
+
+ 
+
+Example 1:
+
+Input: 
+Sales table:
++---------+--------------+------------+
+| sale_id | product_name | sale_date |
++---------+--------------+------------+
+| 1 | LCPHONE | 2000-01-16 |
+| 2 | LCPhone | 2000-01-17 |
+| 3 | LcPhOnE | 2000-02-18 |
+| 4 | LCKeyCHAiN | 2000-02-19 |
+| 5 | LCKeyChain | 2000-02-28 |
+| 6 | Matryoshka | 2000-03-31 |
++---------+--------------+------------+
+Output: 
++--------------+-----------+-------+
+| product_name | sale_date | total |
++--------------+-----------+-------+
+| lckeychain | 2000-02 | 2 |
+| lcphone | 2000-01 | 2 |
+| lcphone | 2000-02 | 1 |
+| matryoshka | 2000-03 | 1 |
++--------------+-----------+-------+
+Explanation: 
+In January, 2 LcPhones were sold. Please note that the product names are not case sensitive and may contain spaces.
+In February, 2 LCKeychains and 1 LCPhone were sold.
+In March, one matryoshka was sold.
+
+
+
+# Write your MySQL query statement below
+select trim(lower(product_name)) as product_name, 
+ date_format(sale_date,'%Y-%m') as sale_date, 
+ count(product_name) as total
+from Sales
+group by trim(lower(product_name)),date_format(sale_date,'%Y-%m')
+order by trim(lower(product_name)),date_format(sale_date,'%Y-%m')