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Quiz 1) 사원의 수가 한명도 없는 부서를 조회하여라.SELECT dept_name FROM departments AS dLEFT JOIN dept_emp AS de ON de.dept_no = d.dept_noWHERE de.emp_no IS NULL;

Quiz 1) 최연소 부서 매니저의 이름, 성별, 근무 연수를 조회하시오.SELECT CONCAT(e.first_name, ' ', e.last_name ) as 'name', gender, TIMESTAMPDIFF(YEAR, e.hire_date, NOW()) AS workYearsFROM dept_manager AS dmJOIN employees AS e ON e.emp_no = dm.emp_no ORDER BY birth_date DESC LIMIT 1;

Quiz 1) 사원 번호가 110420인 직원의 이름, 직급, 역대 연봉 이력을 구하여라SELECT e.emp_no, e.first_name, e.last_name, d.dept_name, t.title, sa.salary, sa.from_date AS salary_from_date, sa.to_date AS salary_to_dateFROM employees eJOIN titles t ON e.emp_no = t.emp_noJOIN dept_emp de ON e.emp_no = de.emp_noJOIN departments d ON de.dept_no = d.dept_noJOIN salaries sa ON e.emp_no = sa.emp_noWHERE..

Quiz 1) 오늘이 생일인 사람이 각 부서마다 몇명인지 오늘 날짜, 부서 이름, 생일자 순으로 출력하여라.SELECT DATE_FORMAT(CURDATE(), '%Y-%m-%d') as '오늘 날짜', d.dept_name AS '부서이름' , COUNT(e.emp_no) AS '생일자 수' FROM employees AS eJOIN dept_emp AS de ON de.emp_no = e.emp_noJOIN departments AS d ON d.dept_no = de.dept_noWHERE DATE_FORMAT(e.birth_date, '%m-%d') = DATE_FORMAT(CURDATE(), '%m-%d') AND de.to_date = '9999-01-01'GROUP BY d.dep..

Quiz 1) 1988년도 이전에 입사했고 직급이 Senior Engineer인 현재 재직중인 직원들의 번호, 이름, 입사 날짜, 근속 연수, 현재 부서 이름을 조회하시오.SELECT t.title as '현재 직급', e.emp_no as '직원번호', CONCAT (first_name, ' ', last_name) as '이름', e.hire_date as '입사 날짜', TIMESTAMPDIFF(YEAR, e.hire_date, NOW()) AS '근속 연수', d.dept_name as '현재 부서'FROM titles AS tJOIN employees AS e ON t.emp_no = e.emp_noJOIN dept_emp AS de ON de.emp_no =..

Quiz 1) 'Development' 부서에서 현재 월급을 가장 많이 받는 직원의 이름과 그 연봉을 출력하라.SELECT CONCAT(e.first_name, ' ', e.last_name) as 'Name', s.salaryFROM dept_emp as de JOIN departments as d ON de.dept_no = d.dept_noJOIN salaries as s ON de.emp_no = s.emp_noJOIN employees as e ON e.emp_no = s.emp_noWHERE dept_name= 'Development' AND s.to_date = '9999-01-01' # 현재 급여 AND de.to_date= '9999-01-01' # 현재 부서ORDER BY ..