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SQL Mixed & interview problems — practice questions · JobPrax
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SQL
Mixed & interview problems
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Basic (25)
Intermediate (7)
Advanced (8)
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Solved
1
Best customers report
Interview
Basic
2
State-wise customers and revenue
Basic
3
Category scorecard
Basic
4
Cancellation rate by city
Basic
5
Products running low
Basic
6
Delivered revenue
Basic
7
Orders per city
Basic
8
Top 3 by orders
Basic
9
Average pay by department
Basic
10
Units sold, including zero
Basic
11
Biggest staff cities
Basic
12
Final exam totals
Basic
13
Customers spending over 5000
Basic
14
Revenue by payment method
Basic
15
Best-selling category
Basic
16
Busy employees
Basic
17
Department with the biggest budget
Basic
18
Fees paid per class
Basic
19
Problem orders
Basic
20
Ninety-plus scorers
Basic
21
Most popular product
Basic
22
First quarter by region
Basic
23
Average order value
Basic
24
Team size per project
Basic
25
Net balance
Basic
26
Month-wise new vs returning customers
Interview
Intermediate
27
Basket size
Intermediate
28
Frequently bought together
Interview
Intermediate
29
Referral revenue
Intermediate
30
Payment preference per customer
Intermediate
31
Department health check
Intermediate
32
Students who improved
Intermediate
33
Customer lifetime summary
Interview
Advanced
34
Top product each month
Advanced
35
Churned customers
Interview
Advanced
36
Running revenue with share of year
Advanced
37
Price changes over time
Advanced
38
Employee project load
Advanced
39
Second purchase conversion
Interview
Advanced
40
Executive dashboard row
Interview
Advanced