Not sure what is wrong with my query, but I can't get it to return any results. I'm using the 2012 version of Northwind as far as I know, and I am trying to get the ProductID, ProductName, Supplier Name, and Quantity purchased for each customer, whose value I am retrieving from a DropDownList as the parameter p1.
My query is as follows:
SELECT Products.ProductID,
Products.ProductName,
Suppliers.CompanyName,
[Order Details].Quantity
FROM Customers
INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID
INNER JOIN [Order Details] ON Orders.OrderID = [Order Details].OrderID
INNER JOIN Products ON [Order Details].ProductID = Products.ProductID
INNER JOIN Suppliers ON Products.SupplierID = Suppliers.SupplierID
WHERE (Orders.CustomerID = #p1);
If anyone can figure out the issue, I would greatly appreciate it.
When i run your query without the parameter the result is just fine, so we're safe to say there is something wrong with your input.
when i run it like this there is also no problem, didnt you forget something like the DECLARE?
DECLARE #p1 NVARCHAR(30)
SET #p1 = 'VINET'
Cheers!
Related
I am currently learning SQL and using the W3Schools Tryit Editor to play around. I am trying to update a table using a lookup from another table. I looked online and figured out the following code to run:
UPDATE OrderDetails
SET OrderDetails.ProductID = Orders.CustomerID
FROM Orders
INNER JOIN OrderDetails
ON OrderDetails.OrderID = Orders.OrderID
But it is coming up with the following error: "Error 1: could not prepare statement (1 near ".": syntax error)"
Is there a problem with my code or are there things that W3Schools doesn't want to run?
The update with join syntax is specific for each db
The query you are using is valid for SQLSERVER
UPDATE OrderDetails
SET OrderDetails.ProductID = Orders.CustomerID
FROM Orders
INNER JOIN OrderDetails
ON OrderDetails.OrderID = Orders.OrderID
but not for my MySQL
UPDATE OrderDetails
INNER JOIN OrderDetails
ON OrderDetails.OrderID = Orders.OrderID
SET OrderDetails.ProductID = Orders.CustomerID
This works:
UPDATE OrderDetails
SET ProductID = (SELECT CustomerID FROM Orders WHERE OrderDetails.OrderID = Orders.OrderID)
WHERE OrderID IN (SELECT OrderID FROM Orders);
Is this what you want?
I have to find the total price per unit quantity and price. How can I make this work in a way where I can consolidate all the orders from one person with the total price that they ordered?
I'm new to SQL and not sure where to start to fix this.
SELECT DISTINCT Orders.OrderID, Customers.ContactName, Orders.OrderDate, [Order
Details].Quantity * [Order Details].UnitPrice
FROM Orders, Customers, [Order Details]
WHERE Orders.CustomerID = Customers.CustomerID
AND Orders.ShipCountry = 'Spain'
Three important things I can advice you to do:
Use explicit JOIN syntax: don't write your tables separately with comma, use explicit JOINs against them so it forces you to write their link at that moment and it's easier to read later. Your attempt was missing a link between the orders and the order details, probably making a lot of duplicates on your results.
Aggregates needs a GROUP BY. Whenever you want to apply aggregate functions like SUM, MAX, COUNT, you will (mostly) need a set of columns you want to group together. These columns go in the GROUP BY clause.
Don't use DISTINCT if you are unsure of the results you are getting. It seems that you used DISTINCT to cover up the missing link between orders and order details, so it just list uniques instead of the actual data your select is returning.
SELECT
C.CustomerID,
C.ContactName,
O.OrderID,
O.OrderDate,
TotalPrice = SUM(D.Quantity * D.UnitPrice)
FROM
Orders AS O
INNER JOIN Customers AS C ON O.CustomerID = C.CustomerID
INNER JOIN [Order Details] AS D ON O.OrderID = D.OrderID
WHERE
O.ShipCountry = 'Spain'
GROUP BY
C.CustomerID,
C.ContactName,
O.OrderID,
O.OrderDate
I think you want to do the join like this...
SELECT DISTINCT Orders.OrderID, Customers.ContactName, Orders.OrderDate,
[Order Details].Quantity * [Order Details].UnitPrice FROM Orders left join
Customers on Orders.CustomerID = Customers.CustomerID left join [Order
Details] on Orders.CustomerID = [Order Details].CustomerID where
Orders.ShipCountry = 'Spain'
I'm trying to find the revenue from customers in an country (United States).
The relevant tables are:
Order Details: Order ID, Unit price, quantity,
Orders: Order ID, customerID
Customers: customerID, country.
I'm not sure how to do this. I was thinking multiple inner join but it doesn't work.
The error message is "Syntax error (missing operator) in query expession 'ORDER DETAILS].ORDERID = ORDER.ORDERID
INNER JOIN CUSTOMERS ON CUSTOMERS.CUSTOMERID = ORDERS.CUSTOMERID'
MS online said Error 3075
Here is what I have:
SELECT SUM(QUANTITY*UNITPRICE) AS Result
FROM [ORDER DETAILS]
INNER JOIN ORDERS ON [ORDER DETAILS].ORDERID = ORDER.ORDERID
INNER JOIN CUSTOMERS ON CUSTOMERS.CUSTOMERID = ORDERS.CUSTOMERID
WHERE COUNTRY = 'Argentina'
Thanks in advance.
Edit: table structure
http://postimg.org/image/oojygytkv/
In Access if you are JOINing more than two tables together then it requires parenthesis. Try the following:
SELECT SUM(QUANTITY * UNITPRICE) AS Result
FROM ([ORDER DETAILS]
INNER JOIN ORDERS ON [ORDER DETAILS].ORDERID = ORDERS.ORDERID)
INNER JOIN CUSTOMERS ON CUSTOMERS.CUSTOMERID = ORDERS.CUSTOMERID
WHERE COUNTRY = 'Argentina'
There is query which is asking for favourite products which is bought by each coustomer. i have to select and in the first select i have selected the count of products that each customer bought. in the other select i want to select the maximum of that boughts for each customer.but when i want to select max(previous select column) it gets and error and says it is not defined can any one helps me how to fix this problem. i am very motivated to solve the problem from this way, and i am not willing to use other methods like creating view or something like that. can any one help me on this:
SELECT INN.Maximum,INN.Name, customer.ProductName from
(SELECT ContactName, ProductName, COUNT([Order Details].Quantity) AS NumOftimeCustomer
FROM Orders, [Order Details], Products, Customers
WHERE [Order Details].OrderID = Orders.OrderID
AND [Order Details].ProductID = Products.ProductID
AND Orders.CustomerID = Customers.CustomerID
GROUP BY ContactName, ProductName)customer
INNER JOIN
(SELECT Customers.ContactName AS Name, **MAX(customer.numOftimecustomer)** AS Maximum
from Customers, customer
GROUP BY Customers.ContactName) INN
ON INN.Name = customer.ContactName AND INN.Maximum = customer.NumOftimeCustomer
that part which is mentioned with MAX(customer.numOftimecustomer) ** is the part which gives error and it says the object customer is not defined. is there a way to solve it without view? why is it in this way? since the customer that i defined is not a table?
here is what you want:
select
*
from (SELECT ContactName, ProductName, COUNT([Order Details].Quantity) AS NumOftimeCustomer
FROM Orders, [Order Details], Products, Customers
WHERE [Order Details].OrderID = Orders.OrderID
AND [Order Details].ProductID = Products.ProductID
AND Orders.CustomerID = Customers.CustomerID
GROUP BY ContactName, ProductName)customer
where customer.num = (select max(num) from
(SELECT ContactName, ProductName, COUNT([Order Details].Quantity) AS NumOftimeCustomer
FROM Orders, [Order Details], Products, Customers
WHERE [Order Details].OrderID = Orders.OrderID
AND [Order Details].ProductID = Products.ProductID
AND Orders.CustomerID = Customers.CustomerID
GROUP BY ContactName, ProductName)customer2
where customer2.name = customer.name)
I could use some help writing a SQL query. I'm trying to display some data from one table but the data I need depends on a value from a different table. I'm pretty new to this so I will try to explain this the best I can:
I have an Orders table with a ShipCity and OrderId columns. I would like to get the OrderId value from Orders where ShipCity = Caracas. using those distinct OrderId values, I would like to query a different table called Order Details where [Order Details].[OrderId] = [Orders].[OrderId] (= to 'Caracas').
I hope that made sense. where I'm getting stuck is I'm sure that I will either need to create some variables or a temporary table to store these values and I don't have any experience with these things yet. I'd appreciate any help. also, these are tables in the Northwind sample database if that helps. below is a dummy sample of what I'm trying to do.
Select OrderId
FROM [Orders]
WHERE ShipCity = 'Caracas'
Select OrderId
FROM [Order Details]
WHERE OrderId = (Orders.ShipCity = 'Caracas')
here's another way of looking at it:
SELECT OrderId
FROM [Order Details]
WHERE OrderId = [Orders].ShipCity = 'Caracas'
You want to use an INNER JOIN
SELECT [Order Details].*
FROM [Order Details]
INNER JOIN [Orders] ON [Orders].OrderId = [Order Details].OrderId
WHERE [Orders].ShipCity = 'Caracas'
More information about joins can be found in the Wikipedia entry or here.
you use a JOIN clause to combine data from two or more tables. Something like this, although you should double check the syntax
select *
from [Orders] o
join [Order Details] od on o.orderid = od.orderid
where o.shipcity = 'Caracas'
You need to join the two tables:
SELECT DISTINCT o.OrderId
FROM Orders o INNER JOIN [Order Details] od ON o.OrderId = od.OrderId
WHERE o.ShipCity = 'Caracas'
...but why do you need the Order Details table in the query?
How about doing with SubQuery method?
SELECT OrderId
FROM [Order Details]
WHERE (OrderId IN SELECT OrderId FROM Orders WHERE ShipCity = 'Caracas')