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 allergy_type ( allergy text, allergytype text )
TABLE: CREATE TABLE has_allergy ( stuid number, allergy text )
TABLE: CREATE TABLE student ( stuid number, lname text, fname text, age number, sex text, major number, advisor number, city_code text )

### Question ###
Show the minimum, average, and maximum age of all students.

### Accurate SQL ###

SELECT MIN(age), AVG(age), MAX(age) FROM student