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 ref_document_types ( document_type_code text, document_type_name text, document_type_description text )
TABLE: CREATE TABLE documents_to_be_destroyed ( document_id number, destruction_authorised_by_employee_id number, destroyed_by_employee_id number, planned_destruction_date time, actual_destruction_date time, other_details text )
TABLE: CREATE TABLE roles ( role_code text, role_name text, role_description text )
TABLE: CREATE TABLE all_documents ( document_id number, date_stored time, document_type_code text, document_name text, document_description text, other_details text )
TABLE: CREATE TABLE ref_calendar ( calendar_date time, day_number number )
TABLE: CREATE TABLE employees ( employee_id number, role_code text, employee_name text, gender_mfu text, date_of_birth time, other_details text )
TABLE: CREATE TABLE document_locations ( document_id number, location_code text, date_in_location_from time, date_in_locaton_to time )
TABLE: CREATE TABLE ref_locations ( location_code text, location_name text, location_description text )

### Question ###
What is the location code for the country 'Canada'?

### Accurate SQL ###

SELECT location_code FROM ref_locations WHERE location_name = "Canada"