I want to Query w3school database - mysql

Question

The database is at: http://www.w3schools.com/sql/trysql.asp?filename=trysql_select_all . Particulary I want to get the list of customers who placed product orders on July 1996 from Speedy Express Shipping Company and were served by employees: Davolio Nancy and Peacock Margaret. The result should have:
Name of customer, contact, address, city, postal code and country
The orderDetailID they placed
Contacts of the shipping company
Product name, price and quantity
Product name, price and units bought
Category of the products
Here is my query:
SELECT
c.CustomerName,
c.ContactName,
c.Address,
c.City,
c.PostalCode,
c.Country,
o.OrderDetailID,
s.Phone,
r.ProductName,
r.Price,
o.Quantity,
g.CategoryName
FROM Customers c
JOIN Orders d
on (c.CustomerID = d.CustomerID)
LEFT JOIN OrderDetails o
on (o.OrderID = d.OrderID)
LEFT JOIN Shippers s
on (s.ShipperID = d.ShipperID)
LEFT JOIN Products r
on (r.ProductID = o.ProductID)
LEFT JOIN Categories g
on (g.CategoryID = r.CategoryID)
LEFT JOIN Employees e
on (e.EmployeeID = d.EmployeeID)
WHERE s.ShipperName = 'Speedy Express' AND
((e.LastName = 'Davolio' AND e.FirstName = 'Nancy') OR
(e.lastName = 'Peacock' AND e.firstName = 'Margaret')) AND
EXTRACT(YEAR_MONTH FROM d.OrderDate) = 199607;
I get error which says:
ERROR 1: Could not prepare statement (1 near "FROM": syntax error)
When I remove the last condition (of extracting the date) as follows:
SELECT c.CustomerName, c.ContactName, c.Address, c.City, c.PostalCode, c.Country, o.OrderDetailID, s.Phone, r.ProductName, r.Price, o.Quantity, g.CategoryName FROM Customers c JOIN Orders d on (c.CustomerID = d.CustomerID) LEFT JOIN OrderDetails o on (o.OrderID = d.OrderID) LEFT JOIN Shippers s on (s.ShipperID = d.ShipperID) LEFT JOIN Products r on (r.ProductID = o.ProductID) LEFT JOIN Categories g on (g.CategoryID = r.CategoryID) LEFT JOIN Employees e on (e.EmployeeID = d.EmployeeID) WHERE s.ShipperName = 'Speedy Express' AND((e.LastName = 'Davolio' AND e.FirstName = 'Nancy') OR (e.lastName = 'Peacock' AND e.firstName = 'Margaret'));
the error disappears. So please how can i fix the year_month condition without getting error!

Answer 1

One possibility here is that your version of MySQL, for whatever reason, does not support YEAR_MONTH being used with EXTRACT(). One workaround here would be to use DATE_FORMAT() instead:
WHERE DATE_FORMAT(d.OrderDate, '%Y%m') = '199607'
To test whether you have an old version of EXTRACT(), just try running the following simple query:
SELECT EXTRACT(YEAR_MONTH FROM NOW());
If this errors out, then my conjecture is correct.