Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

Commit3f2c20c

Browse files
add 1322
1 parent2e4a676 commit3f2c20c

File tree

2 files changed

+77
-0
lines changed

2 files changed

+77
-0
lines changed

‎README.md

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -851,6 +851,7 @@ _If you like this project, please leave me a star._ ★
851851
| # | Title | Solutions | Video | Difficulty | Tag
852852
|-----|----------------|---------------|---------------|---------------|-------------
853853
|1327|[List the Products Ordered in a Period](https://leetcode.com/problems/list-the-products-ordered-in-a-period/)|[Solution](../master/database/_1327.sql)|| Easy|
854+
|1322|[Ads Performance](https://leetcode.com/problems/ads-performance/)|[Solution](../master/database/_1322.sql)|| Easy|
854855
|1294|[Weather Type in Each Country](https://leetcode.com/problems/weather-type-in-each-country/)|[Solution](../master/database/_1294.sql)|| Easy|
855856
|1280|[Students and Examinations](https://leetcode.com/problems/students-and-examinations/)|[Solution](../master/database/_1280.sql)|[:tv:](https://www.youtube.com/watch?v=ThbkV4Fs7iE)| Easy|
856857
|1251|[Average Selling Price](https://leetcode.com/problems/average-selling-price/)|[Solution](../master/database/_1251.sql)|| Easy|

‎database/_1322.sql

Lines changed: 76 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,76 @@
1+
--1322. Ads Performance
2+
--
3+
--Table: Ads
4+
--
5+
--+---------------+---------+
6+
--| Column Name | Type |
7+
--+---------------+---------+
8+
--| ad_id | int |
9+
--| user_id | int |
10+
--| action | enum |
11+
--+---------------+---------+
12+
--(ad_id, user_id) is the primary key for this table.
13+
--Each row of this table contains the ID of an Ad, the ID of a user and the action taken by this user regarding this Ad.
14+
--The action column is an ENUM type of ('Clicked', 'Viewed', 'Ignored').
15+
--
16+
--
17+
--A company is running Ads and wants to calculate the performance of each Ad.
18+
--
19+
--Performance of the Ad is measured using Click-Through Rate (CTR) where:
20+
--
21+
--
22+
--
23+
--Write an SQL query to find the ctr of each Ad.
24+
--
25+
--Round ctr to 2 decimal points. Order the result table by ctr in descending order and by ad_id in ascending order in case of a tie.
26+
--
27+
--The query result format is in the following example:
28+
--
29+
--Ads table:
30+
--+-------+---------+---------+
31+
--| ad_id | user_id | action |
32+
--+-------+---------+---------+
33+
--| 1 | 1 | Clicked |
34+
--| 2 | 2 | Clicked |
35+
--| 3 | 3 | Viewed |
36+
--| 5 | 5 | Ignored |
37+
--| 1 | 7 | Ignored |
38+
--| 2 | 7 | Viewed |
39+
--| 3 | 5 | Clicked |
40+
--| 1 | 4 | Viewed |
41+
--| 2 | 11 | Viewed |
42+
--| 1 | 2 | Clicked |
43+
--+-------+---------+---------+
44+
--Result table:
45+
--+-------+-------+
46+
--| ad_id | ctr |
47+
--+-------+-------+
48+
--| 1 | 66.67 |
49+
--| 3 | 50.00 |
50+
--| 2 | 33.33 |
51+
--| 5 | 0.00 |
52+
--+-------+-------+
53+
--for ad_id = 1, ctr = (2/(2+1)) * 100 = 66.67
54+
--for ad_id = 2, ctr = (1/(1+2)) * 100 = 33.33
55+
--for ad_id = 3, ctr = (1/(1+1)) * 100 = 50.00
56+
--for ad_id = 5, ctr = 0.00, Note that ad_id = 5 has no clicks or views.
57+
--Note that we don't care about Ignored Ads.
58+
--Result table is ordered by the ctr. in case of a tie we order them by ad_id
59+
60+
--# Write your MySQL query statement below
61+
select ad_id,
62+
ifnull(
63+
round(
64+
avg(
65+
case
66+
when action="Clicked" then1
67+
when action="Viewed" then0
68+
elsenull
69+
end
70+
)*100,
71+
2),
72+
0)
73+
as ctr
74+
from Ads
75+
group by ad_id
76+
order by ctrdesc, ad_idasc;

0 commit comments

Comments
 (0)
[8]ページ先頭
©2009-2025 Movatter.jp