SQL Practice
SQL 75
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10. Patients with no city information

Medium Basics & Filtering
Query Rules
  • The query columns and order must match the expected result schema.
  • NULL values should be handled appropriately where applicable.
  • The grader compares output values and sorting order to evaluate.

Schema Browser

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patients
10 cols
doctors
4 cols
admissions
7 cols
province_names
2 cols

Reference Solution

Expected SQL 
SELECT first_name, last_name FROM patients WHERE city IS NULL;
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