[프로그래머스] SQL 연습 IS NULL - 경기도에 위치한 식품창고 목록 출력하기

SELECT WAREHOUSE_ID, WAREHOUSE_NAME, ADDRESS, IFNULL(FREEZER_YN, 'N') AS FREEZER_YN
FROM FOOD_WAREHOUSE
WHERE 1=1
    AND ADDRESS LIKE '%경기%'
ORDER BY WAREHOUSE_ID ASC