CREATE TABLE department_stores (dept_store_chain_id VARCHAR)

What are the ids of the two department store chains with the largest number of department stores?
SELECT dept_store_chain_id FROM department_stores GROUP BY dept_store_chain_id ORDER BY COUNT(*) DESC LIMIT 2
SELECT "dept_store_chain_id" FROM "department_stores" GROUP BY "dept_store_chain_id" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 2