Max and Min sal with employee name in one query

Question

I'm working on one SQL query.

Table name: employees .

I want to get the MAX and MIN sal with their employee names in SQL.

I know how to do with either MAX or MIN . But how can we do it both in one query?

I need a single row output like below:

e1.name AS MaxName, MAX(e1.sal) AS MaxSalary, e2.name AS MinName, MIN(e2.sal) AS MinSalary

Answer 1

Two ways:

Using Analytic function:

SQL> SELECT  MIN(ename) KEEP (DENSE_RANK FIRST ORDER BY sal) min_name,
  2          MIN(sal) AS min_sal,
  3          MAX(ename) KEEP (DENSE_RANK LAST ORDER BY sal) AS max_name,
  4          MAX(sal) AS max_sal
  5  FROM    emp;

MIN_NAME      MIN_SAL MAX_NAME      MAX_SAL
---------- ---------- ---------- ----------
SMITH             800 KING             5000

Using an In-line view :

SQL> WITH DATA AS
  2    ( SELECT MIN(sal) min_sal, MAX(sal) max_sal FROM emp
  3    )
  4  SELECT
  5    (SELECT e.ename FROM DATA t, emp e WHERE e.sal = t.min_sal AND ROWNUM =1
  6    ) min_name,
  7    (SELECT t.min_sal FROM DATA t, emp e WHERE e.sal = t.min_sal AND ROWNUM =1
  8   ) min_sal,
  9    (SELECT e.ename FROM DATA t, emp e WHERE e.sal = t.max_sal AND ROWNUM =1
 10   ) max_name,
 11    (SELECT t.max_sal FROM DATA t, emp e WHERE e.sal = t.max_sal AND ROWNUM =1
 12   ) max_sal
 13     FROM dual;

MIN_NAME      MIN_SAL MAX_NAME      MAX_SAL
---------- ---------- ---------- ----------
SMITH             800 KING             5000

Answer 2

In a single select:

SELECT  MIN( salary ) AS MinSalary,
        MIN( name ) KEEP ( DENSE_RANK FIRST ORDER BY salary ASC ) AS MinName,
        MAX( Salary ) AS MaxSalary,
        MAX( name ) KEEP ( DENSE_RANK LAST ORDER BY salary ASC ) AS MaxName
FROM    Employees;

Answer 3

The following solution works for MySQL, which was one of the tags you originally had when you posted your question.

You can perform a CROSS JOIN of the employees table against itself to find the max name/salary with a query which finds the min name/salary.

SELECT e1.name AS MaxName, MAX(e1.sal) AS MaxSalary,
    e2.name AS MinName, MIN(e2.sal) AS MinSalary
FROM employees e1 CROSS JOIN employees e2

Click the link below for a running demo. I actually include the name/salary pairs, though you can remove the names if you don't want them there.

SQLFiddle

Answer 4

Try something like:

select max(sal), min(sal), employee_id 
from employees
group by employee_id;

After that you can join it to get the name. Maybe you can group by name and id too.

Answer 5

Assuming that you are using Oracle, try this. Here first we are getting rownumber in ascending and descending order and then doing a cross join.

with employee(id,name,sal) as
(select 1,'a',1000 from dual union all
select 3,'c',1500 from dual union all
select 2,'b',2000 from dual)   --temp table to recreate the scenario
, enew as(
select e.*,row_number() over (order by sal) as salasc,row_number() over (order by sal desc) as saldesc from employee e
) --temp table to find the rownumber in ascending and descending order
--original query
select * from (select id as minsalid,name as minsalempname,sal as minsal from enew
where salasc=1)
cross join
(select id as maxsalemp,name as maxsalempname,sal as maxsal from enew
where saldesc=1)