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_27631756_2 ( team VARCHAR, head_coach VARCHAR )

### Question ###
How many teams have a head coach named mahdi ali?

### Accurate SQL ###

SELECT COUNT(team) FROM table_27631756_2 WHERE head_coach = "Mahdi Ali"