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 singer (country VARCHAR, age INTEGER)

### Question ###
What are all distinct countries where singers above age 20 are from?

### Accurate SQL ###

SELECT DISTINCT country FROM singer WHERE age > 20