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-- Basic SQL Demo -- Create a simple employees table DROP TABLE IF EXISTS employees; CREATE TABLE employees ( id INTEGER PRIMARY KEY, name TEXT NOT NULL, department TEXT, salary NUMERIC, hire_date DATE ); -- Insert sample data INSERT INTO employees (name, department, salary, hire_date) VALUES ('Alice Smith', 'Engineering', 85000, '2020-01-15'), ('Bob Johnson', 'Marketing', 72000, '2019-03-20'), ('Carol Williams', 'Engineering', 92000, '2018-11-07'), ('Dave Brown', 'Finance', 115000, '2017-05-12'), ('Eve Davis', 'Engineering', 110000, '2021-08-30'); -- Query the data SELECT department, COUNT(*) as employee_count, ROUND(AVG(salary), 2) as avg_salary FROM employees GROUP BY department ORDER BY avg_salary DESC;
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