DB Fiddle here
SELECT Fname,Lname
FROM EMPLOYEE
WHERE Bdate=(MaxBdate)
GROUP BY Fname,Lname
I tried it this way but does not work.
From your fiddle, assuming that supervisors have NULL in column Super_ssn, I think this will work:
SELECT FName, Lname
FROM EMPLOYEE
WHERE
Super_ssn IS NOT NULL
AND
Bdate = (SELECT MIN(Bdate) FROM EMPLOYEE
WHERE Super_ssn IS NOT NULL)
I would assume an employee (non-supervisor) is one whose ssn is not in the supervisor ssn column.
The oldest can be derived from the min windowing function.
with employees_only as (
select e.*, min (bdate) over (partition by 1) as min_bdate
from employee e
where not exists (
select null
from employee s
where s.super_ssn = e.ssn
)
)
select fname, lname
from employees_only
where bdate = min_bdate
Related
Schema for EMPLOYEE
(ID, EMPLOYEENAME, SALARY, ORGANIZATIONID)
Query to Solve: Find employee Names in each organization with Maximum Salary without a Join.
SELECT E.*
FROM EMPLOYEE E,
(SELECT EMP.ORGANIZATIONID, MAX(EMP.SALARY)
FROM EMPLOYEE EMP
GROUP BY EMP.ORGANIZATIONID) MAXSALARY
WHERE MAXSALARY.SALARY =E.SALARY
AND E.ORGANIZATIONID=EMP.ORGANIZATIONID ;
Is there a way to avoid the join? I am using Spark SQL API and joins cause an extra shuffle operation which is expensive. Is there a way to get the employee name while getting the max salary?
Assume you have a single employee in each organization having the max salary
You can use PARTITION BY with Spark SQL as shown below (Although it will require a subquery)
SELECT E.*
FROM
(SELECT EMP.EMPLOYEENAME, EMP.ORGANIZATIONID, EMP.SALARY,
row_number() OVER (PARTITION BY ORGANIZATIONID ORDER BY SALARY DESC) as rank
FROM EMPLOYEE EMP
) AS E
WHERE E.rank=1
Try this:
SELECT P.ORGANIZATIONID, P.EMPLOYEENAME
FROM EMPLOYEE P
WHERE P.SALARY = (SELECT MAX(E.SALARY) FROM EMPLOYEE E WHERE P.ORGANIZATIONID = E.ORGANIZATIONID)
GROUP BY P.ORGANIZATIONID, P.EMPLOYEENAME
Try this:
SELECT EMPLOYEENAME FROM EMPLOYEE
WHERE SALARY IN (SELECT MAX(SALARY) FROM EMPLOYEE GROUP BY ORGANIZATIONID)
This works to return a name:
SELECT Fname, Lname FROM EMPLOYEE WHERE dno = 4 AND Ssn = 999887777;
returns the employee's name.
But this returns nothing:
SELECT Fname, Lname FROM EMPLOYEE WHERE dno = 4 AND Ssn = (SELECT essn FROM WORKS_ON);
I want to get the names of all employees in Dept. No. 4 whose employee SSNs are found in the WORKS_ON table.
'essn' and 'Ssn' are both 9-character text fields that work in other contexts.
You can't use = to compare a value to a subquery that returns multiple values.
The way to figure out if Ssn is in the result of the subquery is to use IN:
SELECT Fname, Lname
FROM EMPLOYEE
WHERE dno = 4
AND Ssn IN (SELECT essn FROM WORKS_ON);
I have a table named Employee which has the following columns:
ID(primary key) of type int
Name of type varchar(255)
Designation of type varchar(50)
Salary of type int
I want to write a sub-query, which will give me the names of the employees who have greater salary than ANY employee of the designation 'Junior Officer'.
Here's what I have tried but was unsuccessful:
SELECT Name
FROM Employee
WHERE Salary>
(SELECT Salary FROM Employee WHERE Designation = 'Junior Officer');
Try this.
SELECT Name
FROM Employee
WHERE Salary>
(SELECT max(Salary) FROM Employee WHERE Designation = 'Junior Officer');
Because it is urgent, I'm writing you this without testing it. Try this:
SELECT Name
FROM Employee
WHERE Salary >
(SELECT MAX(Salary) FROM Employee WHERE Designation = 'Junior Officer');
I have a table named employee_salary, with three columns: empsal_id, empsal_name and empsal_sal. The data is as follows:
empsal_id empsal_name empsal_sal
1 dilip 14000
2 santosh 20000
3 amit 32000
4 dilip 22000
5 amit 38000
6 santosh 25000
7 dilip 30000
The empsal_id is an Identity column with a Seed and an Increment of 1, and is the Primary Key. I want to return the name and current salary of each employee. Salary can decrease as well as increase, so current does not necessarily mean highest.
So I need the following output:
empname emp_sal
dilip 30000
amit 38000
santosh 25000
I am using Microsoft SQL Server, and I have to do this in a single query.
This query will return each employee, along with their highest salary:
SELECT
empsal_name, MAX(empsal_sal)
FROM
employee
GROUP BY
empsal_name
This query will return each employee, along with their current salary (i.e. the salary with the highest empsal_id:
SELECT
empsal_name, empsal_sal
FROM
employee e1
WHERE
empsal_id =
(SELECT MAX(empsal_id)
FROM employee e2
WHERE e1.empsal_name=e2.empsal_name)
Personally, I think you would be better off using an effective date column (e.g. empsal_effectivedate) to determine which record is the most current, so this query will return each employee, along with their current salary (i.e. the salary with the most recent empsal_effectivedate), assuming there is an empsal_effectivedate field:
SELECT
empsal_name, empsal_sal
FROM
employee e1
WHERE
empsal_effectivedate =
(SELECT MAX(empsal_effectivedate)
FROM employee e2
WHERE e1.empsal_name=e2.empsal_name)
Assuming there is also an ID in the table and also assuming that the larger this ID is the most recent the salary is for that employee you can do
SELECT DISTINCT
e.empname,
(SELECT TOP 1
emp_sal
FROM
employee s
WHERE
s.empname = e.empname
ORDER BY
recid DESC) AS emp_sal
FROM
employee e
(also assuming that empname is unique for an employee)
because of the many assumptions though : you should probably post all the columns of the table and what they mean ..
SELECT empname, MAX(emp_sal)
FROM employee
GROUP BY empname
UPDATED:
SELECT DISTINCT EmpA.empname,
EmpA.emp_sal
FROM Employee AS EmpA
INNER JOIN ( SELECT EmpName, MAX(recID) AS recid
FROM Employee
GROUP BY EmpName
) AS EmpB ON EmpA.recid = EmpB.recid;
You need a date field to determine the latest inserted row . In case if the table is linked to some other table which has date column in it .Then its pretty easy to fetch the current data .
For Example
Employee Table
{
EmpName varchar(30) PK,
EmpAddress varchar(255) ,
Company varchar(30),
CurrentTimeStamp Datetime
}
Salary Table
{
EmpName varchar(30) FK,
EmpSalary int
}
To get the Latest record use the CTE function
With LatestSal(EmpName ,EmpSalary)
AS
(
Select row_number() over (PARTITION BY b.[EmpName], order by CurrentTimestamp DESC) as seq
b.EmpName,b.EmpSalary
From Employee as a,
Salary as b
on a.[EmpName]=b.[EmpName]
)
Select EmpName,EmpSalary
from LatestSal
where seq=1
How can I get id of department in which employees receive the maximum salary:
Employee table: Empl (ID, FirstName, LastName, Salary, DeptId)
Departments table: Dept (ID, City)
rus (Вывести “id” подразделения, в котором сотрудники получают максимальную заработную плату.)
EDIT: Changed SUM(Salary) to AVG(Salary) based on comments on the question.
SELECT TOP 1 DeptId
FROM Employees
GROUP BY DeptId
ORDER BY AVG(Salary) DESC
SELECT TOP 1 B.*
FROM (SELECT DeptId, AVG(Salary) AvgSalary
FROM Empl
GROUP BY DeptId) A
INNER JOIN Dept B
ON A.DeptId = B.Id
ORDER BY AvgSalary DESC
To get the one single Department's ID where the highest single salary is paid:
SELECT TOP 1 DeptID
FROM dbo.Empl
ORDER BY Salary DESC
Or are you looking for something else?
I would assume you mean max average salary of a department and not the single highest salary across all departments.
However it seems all you would have to do is use the following SQL functions
MAX function
AVG function
group by department ID and viola.
Thought I agree with the comments above, I will assume you are doing this for research ;-)
select id
from dept
where id = ( select deptid
from ( select max(avg_salary), deptid
from ( select deptid, avg(salary) as avg_salary
from empl
group by deptid )
group by deptid )
)
:-)
SELECT DepartmentId
FROM Employee
WHERE Salary = (SELECT MAX(Salary) FROM Employee)