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 district (district_name VARCHAR, city_population VARCHAR)

### Question ###
Which district has the largest population?

### Accurate SQL ###

SELECT district_name FROM district ORDER BY city_population DESC LIMIT 1