SQLite Exercise: Get unique department ID from employee table
Write a query to get unique department ID from employee table.
Sample table : employees
SQLite Code :
SELECT DISTINCT department_id
FROM employees;
Output:
department_id ------------- 90 60 100 30 50 80 10 20 40 70 110
Relational Algebra Expression:

Relational Algebra Tree:

Practice SQLite Online
Model Database
Structure of 'hr' database :

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Previous: Write a query to display the names (first_name, last_name) using alias name "First Name", "Last Name".
Next: Write a query to get all employee details from the employee table order by first name, descending.
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