<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Write an SQL query to get the 10 last names of employees working in the “Tech” department.
<|im_end|>
<|im_start|>assistant
SELECT last_name 
FROM employees 
WHERE department = 'Tech' 
ORDER BY last_name DESC 
LIMIT 10;<|im_end|>
