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_24901152_2 ( year INTEGER, championship VARCHAR )

### Question ###
When Australian open is the championship what is the lowest year?

### Accurate SQL ###

SELECT MIN(year) FROM table_24901152_2 WHERE championship = "Australian Open"