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 exhibition ( exhibition_id number, year number, theme text, artist_id number, ticket_price number )
TABLE: CREATE TABLE artist ( artist_id number, name text, country text, year_join number, age number )
TABLE: CREATE TABLE exhibition_record ( exhibition_id number, date text, attendance number )

### Question ###
How many artists do we have?

### Accurate SQL ###

SELECT COUNT(*) FROM artist