How Can I retrieve data from a self joined table

hi all
i have one table with the format
PKEmployeeID PrimaryKey
FKDeptID
Salary
EmployeeName
FKEmployeeID
here I have to retrieve the max salary by dept wise
thats ok by writing
Select max(salary),FKDeptID from Employee_Sarada group by FKDeptID
How can i retrieve the employeename for the max salary
Thanks and Regards
Sarada V
It may be possible in same FKDeptID two or more employee have same
salary which is max in that FKDeptID.
Select max(salary), employeename, FKDeptID from employee_sarda group by
employeename,FKDeptID.
or
if you want only one name then
Select max(salary), max(employeename), FKDeptID from employee_sarda
group by FKDeptID.
Please post ddl with data to get better idea.
Regards
Amish
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|||Hi
Can you provide us with your table's stucture?
--Written by Itzik Ben-Gan
CREATE TABLE Employees
(
empid int NOT NULL,
mgrid int NULL,
empname varchar(25) NOT NULL,
salary money NOT NULL,
CONSTRAINT PK_Employees_empid PRIMARY KEY(empid),
CONSTRAINT FK_Employees_mgrid_empid
FOREIGN KEY(mgrid)
REFERENCES Employees(empid)
)
CREATE INDEX idx_nci_mgrid ON Employees(mgrid)
INSERT INTO Employees VALUES(1 , NULL, 'Nancy' , $10000.00)
INSERT INTO Employees VALUES(2 , 1 , 'Andrew' , $5000.00)
INSERT INTO Employees VALUES(3 , 1 , 'Janet' , $5000.00)
INSERT INTO Employees VALUES(4 , 1 , 'Margaret', $5000.00)
INSERT INTO Employees VALUES(5 , 2 , 'Steven' , $2500.00)
INSERT INTO Employees VALUES(6 , 2 , 'Michael' , $2500.00)
INSERT INTO Employees VALUES(7 , 3 , 'Robert' , $2500.00)
INSERT INTO Employees VALUES(8 , 3 , 'Laura' , $2500.00)
INSERT INTO Employees VALUES(9 , 3 , 'Ann' , $2500.00)
INSERT INTO Employees VALUES(10, 4 , 'Ina' , $2500.00)
INSERT INTO Employees VALUES(11, 7 , 'David' , $2000.00)
INSERT INTO Employees VALUES(12, 7 , 'Ron' , $2000.00)
INSERT INTO Employees VALUES(13, 7 , 'Dan' , $2000.00)
INSERT INTO Employees VALUES(14, 11 , 'James' , $1500.00)
GO

> Select max(salary),FKDeptID from Employee_Sarada group by FKDeptID
> How can i retrieve the employeename for the max salary
CREATE FUNCTION dbo.ufn_GetSubtreeSalary
(
@.mgrid AS int
)
RETURNS int
AS
BEGIN
RETURN (SELECT Salary
FROM Employees WHERE empid = @.mgrid) +
CASE
WHEN EXISTS(SELECT * FROM Employees WHERE mgrid = @.mgrid) THEN
(SELECT SUM(dbo.ufn_GetSubtreeSalary(empid))
FROM Employees
WHERE mgrid = @.mgrid)
ELSE 0
END
END
GO
SELECT dbo.ufn_GetSubtreeSalary(3)
GO
If it doesnot help , pls show us an expected result
"pandu" <saradabhanuv@.gmail.com> wrote in message
news:1135835404.968676.316380@.g14g2000cwa.googlegr oups.com...
> hi all
> i have one table with the format
> PKEmployeeID PrimaryKey
> FKDeptID
> Salary
> EmployeeName
> FKEmployeeID
> here I have to retrieve the max salary by dept wise
> thats ok by writing
> Select max(salary),FKDeptID from Employee_Sarada group by FKDeptID
> How can i retrieve the employeename for the max salary
> Thanks and Regards
> Sarada V
>
|||hi Amish
thanks for ur reply
but,for ur first query
Select max(salary), employeename, FKDeptID from employee_sarda group by
employeename,FKDeptID
its just listing all the records
and for ur second query
Select max(salary), max(employeename), FKDeptID from employee_sarda
group by FKDeptID
but whats it meant by max(employeename) its giving the salary field
correctly
but it only selects the first employeename not the required employeename
the required empname is the employeename corresponding to max salary in
that particular dept
Thanks and regards
Sarada v
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|||hi
this is the table structure
PKEmployeeID bigint
EmployeeName varchar
FKDeptID bigint
Salary decimal
PhoneNumber varchar
FKEmployeeID bigint
and i dont know anything about creating functions and all those stuff
i am loooking for a simple query
Can u help me plz
Thanks and Regards
Sarada V
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|||Try this: ("nested table" techniqe)
select emp.employeename, maxsal.salary1, maxsal.fkdeptid from
employee_sarda,
( Select max(salary) as salary1, FKDeptID from employee_sarda
group by FKDeptID ) as maxsal
where
emp.FKDeptid = maxsal.FKDeptid
emp.salary = maxsal.salary
Note: If 2 or more guys of a dept. earn the same maximum, you'll get
back all of them.
Is this from some exam :-) ?
|||Or this ("correlated subquery")
select emp.employeename, emp.salary, emp.fkdeptid from
employee_sarda emp
where salary =
(select max(salary) from employee_sarda maxsal
where emp.fkdeptid = maxsal.fkdeptid)
|||sorry other option may be like this
select salary , employeename, fkdeptid from employee_sarda e where
salary in (select max(salary) from employee_sarda t where e.fkdeptid =
t.fkdeptid )
or
select salary , employeename, fkdeptid from employee_sarda e where
exists (select max(salary),fkdeptid from employee_sarda t group by
fkdeptid having max(t.salary)= e.salary and e.fkdeptid = t.fkdeptid )
Regards
Amish
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|||Sorry other option may be like this
select salary , employeename, fkdeptid from employee_sharda e where
salary in (select max(salary) from employee_sharda t1 where t1.fkdeptid
= e.fkdeptid )
or
select salary , employeename, fkdeptid from employee_sharda e where
exists (select max(salary),fkdeptid from employee_sharda t1 group by
fkdeptid having max(t1.salary)= e.salary and t1.fkdeptid = e.fkdeptid )
Regards
Amish
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|||Hello Amish,
Great ones, too.
Shalll we now elaborate on the "query plans" of the optimizer for all
these
to determine which is the "quickest" (best ?) :-))
sql