<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>How many points does Tom Hammond have if he has more than 12 points?

SQL Table Create Statement:
CREATE TABLE table_name_12 (points INTEGER, player VARCHAR, extra_points VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT SUM(points) FROM table_name_12 WHERE player = "tom hammond" AND extra_points > 12</codeend><|end|>