Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_2801442_1 (code VARCHAR, population__2011_census_ VARCHAR)
### Question:
What's the code of the district in which 312520 people lived in 2011?
### Answer:
SELECT code FROM table_2801442_1 WHERE population__2011_census_ = 312520