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 branch (city VARCHAR, open_year INTEGER)

### Question ###
Show the city and the number of branches opened before 2010 for each city.

### Accurate SQL ###

SELECT city, COUNT(*) FROM branch WHERE open_year < 2010 GROUP BY city