Find the code of city where most of students are living in.
CREATE TABLE student (city_code VARCHAR)
SELECT TOP 1 city_code FROM student GROUP BY city_code ORDER BY COUNT(*) DESC
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE student (city_code VARCHAR) Question: Find the code of city where most of students are living in. [/INST] SELECT TOP 1 city_code FROM student GROUP BY city_code ORDER BY COUNT(*) DESC </s>