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 addresses ( address_id number, line_1 text, line_2 text, line_3 text, city text, zip_postcode text, state_province_county text, country text, other_address_details text )
TABLE: CREATE TABLE student_addresses ( student_id number, address_id number, date_address_from time, date_address_to time, monthly_rental number, other_details text )
TABLE: CREATE TABLE students ( student_id number, address_id number, first_name text, middle_name text, last_name text, cell_mobile_number text, email_address text, date_first_rental time, date_left_university time, other_student_details text )
TABLE: CREATE TABLE students_in_detention ( student_id number, detention_id number, incident_id number )
TABLE: CREATE TABLE detention ( detention_id number, detention_type_code text, teacher_id number, datetime_detention_start time, datetime_detention_end time, detention_summary text, other_details text )
TABLE: CREATE TABLE ref_incident_type ( incident_type_code text, incident_type_description text )
TABLE: CREATE TABLE teachers ( teacher_id number, address_id number, first_name text, middle_name text, last_name text, gender text, cell_mobile_number text, email_address text, other_details text )
TABLE: CREATE TABLE assessment_notes ( notes_id number, student_id number, teacher_id number, date_of_notes time, text_of_notes text, other_details text )
TABLE: CREATE TABLE behavior_incident ( incident_id number, incident_type_code text, student_id number, date_incident_start time, date_incident_end time, incident_summary text, recommendations text, other_details text )
TABLE: CREATE TABLE ref_address_types ( address_type_code text, address_type_description text )
TABLE: CREATE TABLE ref_detention_type ( detention_type_code text, detention_type_description text )

### Question ###
How many assessment notes are there in total?

### Accurate SQL ###

SELECT COUNT(*) FROM assessment_notes