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Let consider the given partial relation EMP. Let us make some sub-queries for them
EMPNO
ENAME
JOB
SAL
DEPTNO
7566
Nirmal
MANAGER
2975
10
7788
Kailash
ANALYST
3000
7839
Karuna
PRESIDENT
5000
20
7902
Ashwin
7905
Ashwini
4000
Example: Get the details of the people having the minimum salary.
SELECT ENAME, JOB, SAL
FROM EMP
WHERE SAL = ( SELECT MIN (SAL) FROM EMP);
Output:
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
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