I have this query:
select carrier_id, order_id,aircraft_id,quantity
from orderline
innerjoin purchaseorder on orderline.order_id = purchaseorder.carrier_id;
im getting the ambiguous error, I know I have to use aliases but it doesnt work ie:
select carrier_id as cID, order_id as OID,aircraft_id,quantity
from orderline
innerjoin purchaseorder on orderline.order_id as OID = purchaseorder.carrier_id as cID
it says invalid relational operator ?
thanks for your help guys :)
You need a space in your INNER JOIN. Not INNERJOIN.
select carrier_id, order_id,aircraft_id,quantity
from orderline
inner join purchaseorder on orderline.order_id = purchaseorder.carrier_id;
Also, as the other answerer said, your columns may be ambiguously defined (same column name in each table), so you need to prefix the columns with your table name i.e.( select orderline.orderid)
The problem is that after you did the JOIN, you are selecting some columns. Some of those columns probably have the same name on both tables, and you need to specify wich one is it:
select P.carrier_id, O.order_id, O.aircraft_id, P.quantity --use the right prefix
from orderline AS O
inner join purchaseorder AS P
on O.order_id = P.carrier_id;
Related
ERROR Message
Order_ID could refer to more than one table in the FROM clause of the SQL statement
SELECT Customer_ID, o.Order_ID, o.Order_Date, p.Product_Description, p.Product_Finish
FROM Order_T AS o, Order_Line_T AS ol, Product_T AS p
WHERE o.Order_ID=ol.Order_ID
AND ol.Product_ID = p.Product_ID
AND ol.Ordered_Quantity > 3
ORDER BY Order_ID;
I keep getting an error stating Order_ID could refer to more than one table in the FROM clause of the SQL statement, can someone help me with this I have no idea whats wrong.
FROM Order_T AS o, Order_Line_T AS ol, Product_T AS p
WHERE o.Order_ID=ol.Order_ID
....
looking at the above query, you can see that there are at least two columns Order_ID in 2 tables:
o.Order_ID
ol.Order_ID
There is also Order_ID column in this clause ORDER BY Order_ID; without an alias. The database doesn't know which order_id column should use here - o.Order_ID or ol.Order_ID , and reports an error.
Just use an alias in the order by clause: ORDER BY o.Order_ID;, this should fix the problem.
You are missing the JOIN.
While WHERE clauses can be acceptable, it is preferred in Access to use the ON keyword.
Additionally, Access requires parentheses around multiple joins within the same statement.
Try:
FROM (Order_T AS o INNER JOIN Order_Line_T AS ol ON o.Order_ID=ol.Order_ID)
INNER JOIN Product_T AS p ON ol.Product_ID = p.Product_ID
WHERE ol.Ordered_Quantity > 3
ORDER BY o.Order_ID;
Can anyone who knows SQL, specifically the flavor used in Microsoft Access 2013, tell me what I'm doing wrong here?
SELECT custid, custname, ordno, itemno, itemname
FROM cust
INNER JOIN order
ON cust.custid = order.custid
INNER JOIN orderitems
ON order.ordno = orderitems.ordno
INNER JOIN inv
ON orderitems.itemno = inv.itemno;
I've already read other, similar questions, and tried the methods they used in their solutions, but I'm getting a "Syntax error in FROM clause.", almost no matter what I try.
* * *
SOLUTION: Thanks for the replies! In addition to adding square brackets around "order" and using TableName.ColumnName syntax in SELECT, I had to use parentheses for my multiple INNER JOINs. Here is the fixed code:
SELECT cust.custid, cust.custname, [order].ordno, orderitems.itemno, inv.itemname
FROM ((cust
INNER JOIN [order]
ON cust.custid = [order].custid)
INNER JOIN orderitems
ON [order].ordno = orderitems.ordno)
INNER JOIN inv
ON orderitems.itemno = inv.itemno;
SELECT cust.custid --<-- Use two part name here
,cust.custname
,[order].ordno
,orderitems.itemno --<-- Only guessing here use the correct table name
,inv.itemname --<-- Only guessing here use the correct table name
FROM cust
INNER JOIN [order]
ON cust.custid = [order].custid --<-- used square brackets [] around ORDER as it is
INNER JOIN orderitems -- a key word.
ON [order].ordno = orderitems.ordno
INNER JOIN inv
ON orderitems.itemno = inv.itemno;
In your Select Statament you need to use Two Part name i.e TableName.ColumnName since these column can exist in more than one Tables in your FROM clause you need to tell sql server that columns in your select coming from which table in your from clause.
Im practicing basic SQL with this site http://www.sqlishard.com/Exercise
Here is the question:
S5.0 - INNER JOIN
Now that we can pull data out of a single table and qualify column
names, let's take it a step further. JOIN statements allow us to
'join' the rows of several tables together using a condition to define
how they match one another. SELECT [columns] FROM FirstTable INNER
JOIN SecondTable ON FirstTable.Id = SecondTable.FirstTableId
Try using the INNER JOIN syntax to SELECT all columns from the
Customers and Orders tables where the CustomerId column in Orders
matches the Id column in Customers. Since both tables have an Id
column, you will need to qualify the Customers id in the WHERE clause
with either the table name or a table alias.
Here is my answer:
SELECT *
FROM Customers AS c
INNER JOIN Orders AS o ON c.ID = o.ID
WHERE o.CustomerID = c.ID
The site says im wrong? Could anyone explain where i'm going wrong?
EDIT: I see now I dont need the WHERE clause, but the question states..
you will need to qualify the Customers id in the WHERE clause with
either the table name or a table alias.
Hence my confusion. Thanks none the less.
Try this way:
SELECT c.ID,o.ID
FROM Customers AS c
INNER JOIN Orders AS o ON o.CustomerID = c.ID
or using where clause
SELECT *
FROM Customers AS c, Orders AS o
where o.CustomerID = c.ID
If you use JOIN.. ON, you do not need where clause
After executing the code below, i get an ORA-25155 error
SELECT p.prod_id, prod_name, prod_list_price,quantity_sold,cust_last_name
FROM products p NATURAL JOIN sales s NATURAL JOIN customer c
WHERE prod_id = 148;
As suggested on a comment, this ORA-25155 error suggests that you're qualifying the column name "p.prod_id" instead of just "prod_id". That is what is triggering your error.
Try this fully working SQL Fiddle code. Your query should be:
SELECT prod_id, prod_name, prod_list_price,quantity_sold,cust_last_name
FROM products
NATURAL JOIN sales
NATURAL JOIN customer
WHERE prod_id = 148;
A NATURAL JOIN over multiple tables will join one pair of tables, then join the third table to the result and so forth. NATURAL JOIN syntax has no explicit join predicate, so the qualifiers aren't used there.
natural join in Oracle joins two tables on the columns in each table that have common names. Hence after the join, you shouldn't refer to a column which is common between the tables that have been naturally join with an alias, as the alias is redundant.
This is similar to the way using() works in a join clause.
The right command is:
SELECT * FROM products p NATURAL JOIN sales s NATURAL JOIN customer c
I have 2 tables (Orders, OrderItems) that are related based on a column OrderID. I need to find all Orders that do not have any OrderItems.
We use JOIN to find related data. To find data without any related data, we can use an anti-join.
The following joins the tables, then selects those without any order items. This tends to be more efficient that a WHERE id NOT IN (...) style query.
select *
from
Orders O
left outer join OrderItems I
on I.OrderId = O.Id
where
I.Id is null
Select * From Orders Where OrderID not in (Select Distinct OrderID From OrderItems)
try with LEFT EXCEPTION JOIN
select *
from Orders
LEFT EXCEPTION JOIN OrderItems ON ...