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_203_154 ( id number, "type" text, "manufacturer" text, "numbers" text, "year built" number, "quantity built" number, "power (horsepower)" number, "max speed (km/h)" number, "note" text )

### Question ###
how many types of trains have a top speed of more than 100 km/h ?

### Accurate SQL ###

SELECT COUNT("type") FROM table_203_154 WHERE "max speed (km/h)" >= 100