Subqueries with Aggregate function

Subqueries with Aggregate function

SELECT * FROM XXSD_EMP_TL

EMPNO	ENAME	JOB	MGR	SAL	COMM	DEPTNO
7369	SMITH	CLERK	7902	800		20
7499	ALLEN	SALESMAN	7698	1600	300	30
7521	WARD	SALESMAN	7698	1250	500	30
7566	JONES	MANAGER	7839	2975		20
7654	MARTIN	SALESMAN	7698	1250	1400	30
7698	BLAKE	MANAGER	7839	2850		30
7782	CLARK	MANAGER	7839	2450		10
7788	SCOTT	ANALYST	7566	3000		20
7839	KING	PRESIDENT		5000		10
7844	TURNER	SALESMAN	7698	1500	0	30
7876	ADAMS	CLERK	7788	1100		20
7900	JAMES	CLERK	7698	950		30
7902	FORD	ANALYST	7566	3000		20
7934	MILLER	CLERK	7782	1300		10

--====================================================

Aggregate Function :- Max / Min / Avg / Sum / Count

--====================================================

select MAX(SAL) , MIN(SAL), AVG(SAL), SUM(SAL), COUNT(SAL)

from XXSD_EMP_TL

MAX(SAL)	MIN(SAL)	AVG(SAL)	SUM(SAL)	COUNT(SAL)
12000	800	3351.785714	46925	14

--====================================================

--if any one ask regarding max / min salary

--====================================================

select MAX(SAL) from xxsd_emp_tl

5000

--====================================================

-- if i want to know about the employee info who gets this salary

--====================================================

select * from xxsd_emp_tl

where sal = 5000  --  ( it provides always static  info )

select MAX(SAL) from  xxsd_emp_tl

select * from xxsd_emp_tl

where sal = ( select MAX(SAL) from  xxsd_emp_tl )    --  ( it provides always static  info )

edit xxsd_emp_tl