<|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
Update the following SQL query to return all the values in the `students` table.
SELECT * FROM students where age > 20;<|im_end|>
<|im_start|>assistant
SELECT * FROM students;<|im_end|>
