Practice Questions

single table SQL Interview Questions

Master SQL interview patterns with structured question sets, company filters, and run-ready challenges.

affirm afterpay airbnb amazon apple doordash dropbox ebay facebook google linkedin lyft microsoft netflix robinhood roblox snap spotify tiktok twitter uber visa walmart

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Chapter 18: Single Table Clear filters

ID	Title	Level	FTPR	Lecture
1	Top store for movie sales	Easy	24%	2.1
2	Top 3 movie categories by sales	Easy	42%	2.1
3	Top 5 shortest movies	Easy	49%	2.1
4	Staff without a profile image	Easy	66%	2.1
5	Monthly revenue	Easy	20%	2.2
6	Daily revenue in June, 2020	Medium	12%	2.2
7	Unique customers count by month	Easy	18%	2.2
8	Average customer spend by month	Easy	20%	2.2
9	Number of high spend customers by month	Medium	4%	2.2
10	Min and max spend	Easy	11%	2.2
11	Actors' last name	Easy	21%	2.3
12	Actors' last name ending in 'EN' or 'RY'	Easy	27%	2.3
13	Actors' first name	Medium	14%	2.3
14	Good days and bad days	Hard	4%	2.3
15	Fast movie watchers vs slow watchers	Hard	6%	2.3
16	Staff who live in Woodridge	Easy	65%	2.1
17	GROUCHO WILLIAMS’ actor_id	Easy	57%	2.1
18	Top film category	Easy	22%	2.2
19	Most productive actor	Medium	13%	2.2
20	Customer who spent the most	Medium	14%	2.2
21	Customer who rented the most	Medium	16%	2.2
22	Average cost per rental transaction	Easy	42%	2.3
23	Average spend per customer in Feb 2020	Easy	16%	2.2
24	Films with more than 10 actors	Medium	19%	2.3
25	Shortest film	Easy	46%	2.3
26	Second shortest film	Easy	30%	2.3
27	Film with the largest cast	Easy	27%	2.3
28	Film with the second largest cast	Medium	26%	2.3
29	Second highest spend customer	Medium	14%	2.3
30	Inactive customers in May	Easy	22%	2.3
31	Movies that have not been returned	Easy	26%	2.3
32	Unpopular movies	Hard	17%	2.3
33	Returning customers	Medium	8%	2.3
34	Stocked up movies	Easy	27%	2.3
35	Film length report	Easy	27%	2.3
81	How many people searched on new year's day facebook	Easy	24%	2.2
82	The top search query on new year's day facebook	Easy	13%	2.2
84	Click through rate on new year's day facebook	Medium	9%	2.2
85	Top 4 queries based on click through rate on new year's day facebook	Hard	7%	2.2
86	Top song in the US spotify	Easy	18%	2.2
89	Top 5 artists in the US spotify	Medium	13%	2.2
92	Acceptance rate first week of 2021 spotify	Easy	14%	2.1
93	number of sales for each product this month amazon	Easy	20%	2.2
95	Candidate products for subscription amazon	Hard	13%	2.2
96	Overall acceptance rate facebook	Easy	13%	2.2
97	Social influencer facebook	Easy	10%	2.2
98	Most popular user facebook	Easy	33%	2.2
101	Average number of visits per user google	Easy	14%	2.2
102	Histogram by visit session duration google	Hard	17%	2.3
106	Mobile vs. web google	Medium	10%	2.2
107	Customer count by platform google	Medium	17%	2.2
111	Second most popular product amazon	Medium	16%	2.1
112	Top 3 customers amazon	Easy	30%	2.2
124	Active restaurants by city uber	Easy	41%	2.2
125	Active restaurants with fewer than 5 trips per city uber	Easy	16%	2.2
126	Top 3 restaurants uber	Hard	10%	2.1
128	Completion rate uber	Easy	26%	2.2
130	Newly created accounts affirm	Easy	37%	2.2
131	Churned accounts affirm	Hard	10%	2.3
132	Top 3 trending countries affirm	Medium	9%	2.2
133	Small departments robinhood	Easy	45%	2.2
134	Expensive departments robinhood	Medium	38%	2.2
136	Extremely late orders doordash	Easy	11%	2.3
138	Happy restaurants doordash	Easy	14%	2.3
143	Customer purchase report afterpay	Easy	14%	2.2
146	Purchase by platform afterpay	Easy	14%	2.2
149	fans by video category google	Easy	36%	2.2
151	Salary report dropbox	Easy	18%	2.3
152	Salary analysis dropbox	Easy	20%	2.1
153	Project ROI dropbox	Easy	18%	2.2
154	Rideshare completion rate lyft	Easy	25%	2.2
155	Driver with the highest cancellation rate lyft	Easy	24%	2.3
156	Cancellation rate by unbanned users lyft	Hard	15%	2.3
159	Transaction volume from suspended accounts ebay	Easy	58%	2.2
160	Sellers with no sales by day ebay	Hard	11%	2.3
161	Biggest sales day ebay	Easy	20%	2.2
163	Average number of orders per brand walmart	Easy	32%	2.2
164	Orders distribution by brand walmart	Easy	28%	2.2
167	Top country in video streaming tiktok	Easy	28%	2.2
169	Same day streams tiktok	Easy	34%	2.2
170	Top 3 countries by average watch time tiktok	Easy	11%	2.2
171	Binge watches tiktok	Easy	19%	2.2
173	User Popularity Percentage facebook	Medium	11%	2.2
174	Closed accounts facebook	Easy	23%	2.2
175	Employees' email account amazon	Easy	14%	2.1
176	Employees' annual bonus amazon	Easy	12%	2.3
177	Purchases by platform report amazon	Medium	10%	2.3
178	Members who worked at both Microsoft and Google linkedin	Medium	34%	2.3
181	Users who watched less than one hour of Netflix netflix	Easy	19%	2.2
183	Top 5 movies by number of watchers netflix	Easy	46%	2.2
184	Top 5 movies by watch time netflix	Medium	16%	2.2
185	Top 5 non-English contents by watch time netflix	Medium	49%	2.2
186	Average comments per question google	Easy	10%	2.2
187	Comment distribution at Google Forum google	Easy	17%	2.2
190	Twitter campaign spend report twitter	Hard	22%	2.2
192	Number of replies to the original tweet by group twitter	Medium	25%	2.2
193	Difference of replies by testing groups twitter	Medium	33%	2.2
196	User segments report snap	Hard	18%	2.2
197	Students who didn't finish all subjects snap	Easy	25%	2.2
198	Average score per subject snap	Easy	50%	2.2
200	Last week's absent students snap	Medium	67%	2.1
202	Monthly active paid subscriptions apple	Hard	50%	2.2
204	AB testing sanity check apple	Easy	50%	2.2
205	Search results recall apple	Medium	30%	2.2
206	Search results recall by testing group apple	Medium	30%	2.2
207	Results shown rate by group apple	Medium	50%	2.2
209	Card issuer customers count visa	Easy	100%	2.2
210	Issuer and merchant report visa	Easy	100%	2.1
214	D30 (30days) retention rate roblox	Medium	20%	2.2
215	Monthly active users roblox	Easy	80%	2.2
216	Most active customers roblox	Hard	10%	2.2
217	Most engaged customers roblox	Hard	10%	2.1
218	Total Amount Spent by Each Customer microsoft	Medium	-	2.1
219	Inactive Customers in the New Year of 2024 microsoft	Medium	-	2.1
220	Most Expensive Product in Each Category microsoft	Hard	-	2.1
221	Customers With More Than 5 Products in a Single Transaction microsoft	Hard	-	2.1
222	Product Sales Ranking Within Categories microsoft	Hard	-	2.1
223	Cumulative Total Sales by Day microsoft	Hard	-	2.1
224	Categories with High Average Product Price microsoft	Medium	-	2.1
225	Customer Behavior Analysis microsoft	Hard	-	2.1
226	Customer Lifetime Value (CLV) and Segmentation microsoft	Hard	-	2.1
227	Aggregate Sale Amounts per Customer microsoft	Hard	-	2.1
228	Analyzing Sequential Purchase Behavior microsoft	Hard	-	2.1

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