EMP 테이블에서 평균 급여보다 높은 급여를 받는 사원을 조회하는 쿼리로 가장 옳은 것은?

1. 1SELECT ename, sal FROM emp WHERE sal > AVG(sal)
2. 2SELECT ename, sal FROM emp WHERE sal > (SELECT AVG(sal) FROM emp)
3. 3SELECT ename, AVG(sal) FROM emp WHERE sal > AVG(sal) GROUP BY ename
4. 4SELECT ename, sal FROM emp HAVING sal > AVG(sal)