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 (name VARCHAR, membership_amount VARCHAR)

### Question ###
What are names for top three branches with most number of membership?

### Accurate SQL ###

SELECT name FROM branch ORDER BY membership_amount DESC LIMIT 3