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1.2 你的收获
-
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🍅 2、今日真题
题目介绍: Fix Product Name Format fix-product-name-format
难度简单
SQL架构
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
-
in lowercase without leading or trailing white spaces.product_name
-
in the formatsale_date
('YYYY-MM')
-
the number of times the product was sold in this month.total
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.
``` Sales +------------+------------------+--------------+ | 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 | +------------+------------------+--------------+
Result table: +--------------+--------------+----------+ | product_name | sale_date | total | +--------------+--------------+----------+ | lcphone | 2000-01 | 2 | | lckeychain | 2000-02 | 2 | | lcphone | 2000-02 | 1 | | matryoshka | 2000-03 | 1 | +--------------+--------------+----------+
In January, 2 LcPhones were sold, please note that the product names are not case sensitive and may contain spaces. In Februery, 2 LCKeychains and 1 LCPhone were sold. In March, 1 matryoshka was sold. ```文章来源:https://www.toymoban.com/news/detail-539929.html
sql
select trim(lower(product_name)) as product_name,
date_format(sale_date,'%Y-%m') as sale_date,
count(*) as total
from Sales
group by trim(lower(product_name)), date_format(sale_date,'%Y-%m')
order by product_name asc, sale_date asc
注意大小写、空格 文章来源地址https://www.toymoban.com/news/detail-539929.html
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