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Multiple Conditions (AND / OR)
Find male passengers in first class (pclass = 1) OR female passengers in third class (pclass = 3). Show name, sex, pclass, age, and survived. Limit to 20 rows. Be careful with operator precedence!
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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: First-class men and third-class women
Hint
Use parentheses to group conditions: WHERE (sex = 'male' AND pclass = 1) OR (sex = 'female' AND pclass = 3). Without parentheses, AND binds tighter than OR.
Concepts
SELECT WHERE AND OR
Practise the topic: SQL practice questions
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