SQLD · 제62회 · 48번

-- (가)
SELECT DNAME
FROM DEPT;

-- (나)
SELECT b.DEPTNO
FROM (
  SELECT b.DEPTNO
  FROM DEPT b
) a;

-- (다)
SELECT SUBSTR(DNAME, 1, 3)
FROM DEPT;

-- (라)
SELECT RTRIM(DNAME)
FROM DEPT;