MySQL winter vacation self-study 2022 11 (5)

Keywords of subquery

all any some in exists

use mydb3;
--  Query age is greater than '1003' Employee information of all ages in the Department 
select * from emp3 where age > all (select age from emp3 where dept_id = '1003');
--  Query employee information that does not belong to any department 
select * from emp3 where dept_id != all (select deptno from dept3);