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 table_name_12 ( points INTEGER, player VARCHAR, extra_points VARCHAR )

### Question ###
How many points does Tom Hammond have if he has more than 12 points?

### Accurate SQL ###

SELECT SUM(points) FROM table_name_12 WHERE player = "tom hammond" AND extra_points > 12