SQL Quest › SQL Interview Questions › Aggregation & Grouping
Female Survivor Count
A historical analysis is fact-checking the famous "women and children first" claim. As a starting data point, count how many female passengers survived the voyage.
Return a single number as survivor_count.
This is the simplest conditional count: COUNT(*) after a WHERE that narrows the rows. The alternative is SUM(CASE WHEN ... THEN 1 ELSE 0 END) which lets you compute multiple conditional counts in one pass — useful later, but unnecessary when you only need one.
Solve it in the browser editor →
Runs on SQLite in your browser, graded against the expected result, no signup. A wrong answer gets a diagnosis, not just "incorrect".
Schema
passengers
| passenger_id | survived | pclass | name | sex | age | sibsp | parch | fare | embarked |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 0 | 3 | Braund, Mr. Owen Harris | male | 22 | 1 | 0 | 7.25 | S |
| 2 | 1 | 1 | Cumings, Mrs. John Bradley | female | 38 | 1 | 0 | 71.28 | C |
| 3 | 1 | 3 | Heikkinen, Miss. Laina | female | 26 | 0 | 0 | 7.93 | S |
Expected output: survivor_count = 3
Hint
SELECT, COUNT, WHERE, and open the hint there if you stall.Concepts
SELECT COUNT WHERE Aggregation
Practise the topic: SQL practice questions · GROUP BY exercises
Related questions
Where would this cost you points in an interview?
Ten questions, no signup: a Skillmap across nine SQL skills and the one to fix first.
Take the readiness test