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_name_40 (name_and_flag VARCHAR, water_area__km_2__ VARCHAR)

### Question ###
Which province and flag has a water area (km 2) of 0?

### Accurate SQL ###

SELECT name_and_flag FROM table_name_40 WHERE water_area__km_2__ = 0