What SQL questions are asked in Google interviews?
Technical interviews at Google cover curated SQL and relational database queries, including joins, window functions, aggregations, and subqueries.
Google SQL
Verified90 SQL queries·52 Easy·31 Medium·7 Hard
Curated SQL and relational database interview problems asked by Google, ranked by frequency with direct problem links.
⌘K
Easy·Freq 66%·Acc 88.6%
Easy·Freq 57%·Acc 79.7%
Hard·Freq 55%·Acc 42.9%
Medium·Freq 50%·Acc 47.5%
#1148Article Views I
Easy·Freq 50%·Acc 76.7%
Easy·Freq 46%·Acc 73.5%
Easy·Freq 44%·Acc 73.1%
#595Big Countries
Easy·Freq 42%·Acc 68.6%
Easy·Freq 42%·Acc 51.6%
Easy·Freq 38%·Acc 66.8%
#577Employee Bonus
Easy·Freq 38%·Acc 77.7%
Easy·Freq 38%·Acc 37.5%
Medium·Freq 38%·Acc 49.2%
Easy·Freq 38%·Acc 61.5%
Easy·Freq 38%·Acc 83.6%
Medium·Freq 38%·Acc 48.8%
Easy·Freq 38%·Acc 67.9%
Medium·Freq 33%·Acc 59.4%
Easy·Freq 32%·Acc 72.0%
Easy·Freq 30%·Acc 74.9%
#182Duplicate Emails
Easy·Freq 30%·Acc 74.0%
#1683Invalid Tweets
Easy·Freq 30%·Acc 85.2%
#178Rank Scores
Medium·Freq 29%·Acc 68.2%
Easy·Freq 28%·Acc 66.3%
Easy·Freq 28%·Acc 53.8%
Medium·Freq 28%·Acc 39.5%
Easy·Freq 27%·Acc 51.1%
Medium·Freq 27%·Acc 58.1%
Medium·Freq 27%·Acc 56.4%
#1075Project Employees I
Easy·Freq 26%·Acc 67.0%
#1934Confirmation Rate
Medium·Freq 25%·Acc 62.2%
Medium·Freq 25%·Acc 41.7%
#626Exchange Seats
Medium·Freq 25%·Acc 74.4%
Medium·Freq 25%·Acc 58.6%
Easy·Freq 25%·Acc 60.6%
Easy·Freq 25%·Acc 85.9%
Easy·Freq 25%·Acc 75.1%
Medium·Freq 25%·Acc 51.4%
Hard·Freq 25%·Acc 65.8%
Medium·Freq 25%·Acc 83.9%
Hard·Freq 25%·Acc 78.4%
Easy·Freq 25%·Acc 87.7%
Easy·Freq 25%·Acc 48.8%
#1667Fix Names in a Table
Easy·Freq 25%·Acc 60.6%
Easy·Freq 25%·Acc 53.5%
#3054Binary Tree Nodes
Medium·Freq 25%·Acc 78.3%
Easy·Freq 25%·Acc 86.3%
#2991Top Three Wineries
Hard·Freq 25%·Acc 54.1%
Easy·Freq 25%·Acc 77.2%
#2989Class Performance
Medium·Freq 25%·Acc 88.6%
# | SQL Problem | Difficulty | Frequency↓ | Acceptance | |
|---|---|---|---|---|---|
| #1757 | Recyclable and Low Fat Products3 sources | Easy | 66% | 88.6% | |
| #175 | Combine Two Tables3 sources | Easy | 57% | 79.7% | |
| #2995 | Viewers Turned Streamers2 sources | Hard | 55% | 42.9% | |
| #176 | Second Highest Salary3 sources | Medium | 50% | 47.5% | |
| #1148 | Article Views I3 sources | Easy | 50% | 76.7% | |
| #181 | Easy | 46% | 73.5% | ||
| #584 | Find Customer Referee3 sources | Easy | 44% | 73.1% | |
| #595 | Big Countries3 sources | Easy | 42% | 68.6% | |
| #197 | Rising Temperature3 sources | Easy | 42% | 51.6% | |
| #1661 | Average Time of Process per Machine3 sources | Easy | 38% | 66.8% | |
| #577 | Employee Bonus3 sources | Easy | 38% | 77.7% | |
| #1251 | Average Selling Price3 sources | Easy | 38% | 37.5% | |
| #570 | Medium | 38% | 49.2% | ||
| #1280 | Students and Examinations3 sources | Easy | 38% | 61.5% | |
| #1378 | Easy | 38% | 83.6% | ||
| #180 | Consecutive Numbers3 sources | Medium | 38% | 48.8% | |
| #1581 | Easy | 38% | 67.9% | ||
| #1193 | Monthly Transactions I3 sources | Medium | 33% | 59.4% | |
| #183 | Customers Who Never Order3 sources | Easy | 32% | 72.0% | |
| #610 | Triangle Judgement3 sources | Easy | 30% | 74.9% | |
| #182 | Duplicate Emails3 sources | Easy | 30% | 74.0% | |
| #1683 | Invalid Tweets3 sources | Easy | 30% | 85.2% | |
| #178 | Rank Scores3 sources | Medium | 29% | 68.2% | |
| #196 | Delete Duplicate Emails3 sources | Easy | 28% | 66.3% | |
| #1211 | Queries Quality and Percentage3 sources | Easy | 28% | 53.8% | |
| #177 | Nth Highest Salary3 sources | Medium | 28% | 39.5% | |
| #1141 | User Activity for the Past 30 Days I3 sources | Easy | 27% | 51.1% | |
| #1164 | Product Price at a Given Date3 sources | Medium | 27% | 58.1% | |
| #1174 | Immediate Food Delivery II3 sources | Medium | 27% | 56.4% | |
| #1075 | Project Employees I3 sources | Easy | 26% | 67.0% | |
| #1934 | Confirmation Rate3 sources | Medium | 25% | 62.2% | |
| #550 | Game Play Analysis IV3 sources | Medium | 25% | 41.7% | |
| #626 | Exchange Seats3 sources | Medium | 25% | 74.4% | |
| #184 | Department Highest Salary3 sources | Medium | 25% | 58.6% | |
| #1633 | Easy | 25% | 60.6% | ||
| #1068 | Product Sales Analysis I3 sources | Easy | 25% | 85.9% | |
| #620 | Not Boring Movies3 sources | Easy | 25% | 75.1% | |
| #585 | Investments in 20163 sources | Medium | 25% | 51.4% | |
| #569 | Median Employee Salary3 sources | Hard | 25% | 65.8% | |
| #1270 | Medium | 25% | 83.9% | ||
| #1767 | Hard | 25% | 78.4% | ||
| #1821 | Easy | 25% | 87.7% | ||
| #1978 | Easy | 25% | 48.8% | ||
| #1667 | Fix Names in a Table3 sources | Easy | 25% | 60.6% | |
| #1731 | Easy | 25% | 53.5% | ||
| #3054 | Binary Tree Nodes2 sources | Medium | 25% | 78.3% | |
| #2985 | Calculate Compressed Mean2 sources | Easy | 25% | 86.3% | |
| #2991 | Top Three Wineries2 sources | Hard | 25% | 54.1% | |
| #2987 | Find Expensive Cities2 sources | Easy | 25% | 77.2% | |
| #2989 | Class Performance2 sources | Medium | 25% | 88.6% |
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