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Single Table Operation: Lecture 2: COUNT, SUM, AVERAGE, MIN, MAX, GROUP BY, HAVING

ID Title Level FTPR Lecture
5 Monthly revenue easy
24%
2.2
6 Daily revenue in June, 2020 medium
11%
2.2
7 Unique customers count by month easy
19%
2.2
8 Average customer spend by month easy
22%
2.2
9 Number of high spend customers by month medium
4%
2.2
10 Min and max spend easy
13%
2.2
18 Top film category easy
25%
2.2
19 Most productive actor medium
14%
2.2
20 Customer who spent the most medium
15%
2.2
21 Customer who rented the most medium
20%
2.2
23 Average spend per customer in Feb 2020 easy
16%
2.2
81 How many people searched on new year's day search engine easy
24%
2.2
82 The top search query on new year's day search engine easy
12%
2.2
84 Click through rate on new year's day search engine medium
10%
2.2
85 Top 4 queries based on click through rate on new year's day search engine hard
6%
2.2
86 Top song in the US spotify easy
19%
2.2
89 Top 5 artists in the US spotify medium
11%
2.2
93 number of sales for each product this month amazon easy
19%
2.2
95 Candidate products for subscription amazon hard
11%
2.2
96 Overall acceptance rate social easy
13%
2.2
97 Social influencer social easy
10%
2.2
98 Most popular user social easy
29%
2.2
101 Average number of visits per user mobile easy
12%
2.2
106 Mobile vs. web mobile medium
9%
2.2
107 Customer count by platform mobile medium
19%
2.2
112 Top 3 customers amazon easy
30%
2.2
124 Active restaurants by city uber easy
36%
2.2
125 Active restaurants with fewer than 5 trips per city uber easy
14%
2.2
128 Completion rate uber easy
23%
2.2
130 Newly created accounts affirm easy
34%
2.2
132 Top 3 trending countries affirm medium
8%
2.2
133 Small departments robinhood easy
44%
2.2
134 Expensive departments robinhood medium
32%
2.2
143 Customer purchase report afterpay easy
15%
2.2
146 Purchase by platform afterpay easy
13%
2.2
149 fans by video category social easy
30%
2.2
153 Project ROI dropbox easy
18%
2.2
154 Rideshare completion rate lyft easy
22%
2.2
159 Transaction volume from suspended accounts ebay easy
51%
2.2
161 Biggest sales day ebay easy
19%
2.2
163 Average number of orders per brand walmart easy
36%
2.2
164 Orders distribution by brand walmart easy
22%
2.2
167 Top country in video streaming tiktok easy
24%
2.2
169 Same day streams tiktok easy
29%
2.2
170 Top 3 countries by average watch time tiktok easy
10%
2.2
171 Binge watches tiktok easy
19%
2.2
173 User Popularity Percentage social medium
5%
2.2
174 Closed accounts social easy
18%
2.2
181 Users who watched less than one hour of Netflix netflix easy
23%
2.2
183 Top 5 movies by number of watchers netflix easy
33%
2.2
184 Top 5 movies by watch time netflix medium
7%
2.2
185 Top 5 non-English contents by watch time netflix medium
53%
2.2
186 Average comments per question google easy
50%
2.2
187 Comment distribution at Google Forum google easy
50%
2.2
190 Twitter campaign spend report twitter hard
50%
2.2
192 Number of replies to the original tweet by group twitter medium
100%
2.2
193 Difference of replies by testing groups twitter medium
100%
2.2
196 User segments report snap hard - 2.2
197 Students who didn't finish all subjects snap easy - 2.2
198 Average score per subject snap easy - 2.2
202 Monthly active paid subscriptions subscription easy - 2.2
204 AB testing sanity check search engine easy - 2.2
205 Search results recall search engine medium - 2.2
206 Search results recall by testing group search engine medium - 2.2
209 Card issuer customers count visa easy - 2.2
214 D30 retention rate gaming hard - 2.2
215 Monthly active users gaming hard - 2.2
216 Highest spender gaming hard - 2.2

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