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_197638_7 ( _number INTEGER, french_open VARCHAR )

### Question ###
What is the number for the french open 1974?

### Accurate SQL ###

SELECT MAX(_number) FROM table_197638_7 WHERE french_open = 1974