Incorrect syntax near using

Question

I have 3 tables as:

Salesperson
1)ID
2)Name
3)Age
4)Salary

Customer
1)ID
2)Name
3)City
4)IndustryType

Orders
1)Number
2)Order_date
3)cust_id
4)salesperson_id
5)Amount

Here is the problem: find the largest order amount for each salesperson and the associated order number, along with the customer to whom that order belongs.

While implementing this

Select salesperson_id,Numbers As ordernum,Amount
from dbo.Orders As Ord  Inner Join 
(
Select salesperson_id,Max(Amount) as MaxOrder
from dbo.Orders
group by salesperson_id
) as TopOrder
on TopOrder.salesperson_id = Ord.salesperson_id 
where TopOrder.MaxOrder=Ord.Amount

but it shows an error:

Msg 209, Level 16, State 1, Line 1
Ambiguous column name 'salesperson_id'.

Answer 1

You have two salesperson_id in your query, one in the table Orders and one in the subquery TopOrder.

Best practice is always to qualify the field name with the table name or alias.

Answer 2

I don't know if sql server supports the using keyword. The only db I know that does is redbrick. You might have to change

using (saleperson_id)

to

where toporder.salesperson_id = orders.salesperson_id

Answer 3

select sp.Name, od.Numbers, Max(od.Amount)
from SalesPerson as sp left join Orders as od  on sp.ID = od.salesperson_id
Group By sp.ID
having od.Amount = Max(od.Amount)

This query will help you list all the sale person name and oder number of order with maximum amount Try this and feedback me whether it helps you or not

Answer 4

Try:

Select Ord.salesperson_id,Numbers As ordernum,Amount
from dbo.Orders As Ord  Inner Join 
(
Select salesperson_id,Max(Amount) as MaxOrder
from dbo.Orders
group by salesperson_id
) as TopOrder
on TopOrder.salesperson_id = Ord.salesperson_id 
where TopOrder.MaxOrder=Ord.Amount

Answer 5

select p_orders.salesperson_id,number as 'OrderNum',amount from p_orders
INNER JOIN
(
select salesperson_id,MAX(amount) as 'MAXORDER' from p_orders group by salesperson_id 
) as TopOrderAmountPerPerson
ON TopOrderAmountPerPerson.salesperson_id=p_orders.salesperson_id 
and p_orders.amount=TopOrderAmountPerPerson.maxorder