Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE student (city_code VARCHAR, age INTEGER)

### Question ###
Find the number and average age of students living in each city.

### Accurate SQL ###

SELECT COUNT(*), AVG(age), city_code FROM student GROUP BY city_code