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MySQL winter vacation self-study 2022 11 (5)
2022-07-06 02:25:00 【Crane paper thousand】
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);
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