Adding graph examples (#258)

* Adding graph examples

* Updating README.md

samples/features/sql-graph/create_graph_tables.sql

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+-- clean database
+DROP TABLE IF EXISTS Graph.Customers;
+DROP TABLE IF EXISTS Graph.StockItems;
+DROP TABLE IF EXISTS Graph.Suppliers;
+
+DROP TABLE IF EXISTS Graph.OrderLines_CustomersToStockItems;
+DROP TABLE IF EXISTS Graph.OrderLines_StockItemsToCustomers;
+
+DROP TABLE IF EXISTS Graph.InvoiceLines_CustomersToStockItems;
+DROP TABLE IF EXISTS Graph.InvoiceLines_StockItemsToCustomers;
+
+DROP TABLE IF EXISTS Graph.PurchaseOrderLines_SuppliersToStockItems;
+DROP TABLE IF EXISTS Graph.PurchaseOrderLines_StockItemsToSuppliers;
+
+DROP SCHEMA IF EXISTS Graph;
+go
+
+-- define schema
+CREATE SCHEMA Graph;
+go
+
+/* SALES schema */
+-- create node table for Sales.Customers
+CREATE TABLE Graph.Customers (
+	CustomerID					int,
+	CustomerName				nvarchar(100),
+	BillToCustomerID			int,
+	CustomerCategoryID			int,
+	BuyingGroupID				int,
+	PrimaryContactPersonID		int,
+	AlternateContactPersonID	int,
+	DeliveryMethodID			int,
+	DeliveryCityID				int,
+	PostalCityID				int,
+	CreditLimit					decimal(18,2),
+	AccountOpenedDate			date,
+	StandardDiscountPercentage	decimal(18,3),
+	IsStatementSent				bit,
+	IsOnCreditHold				bit,
+	PaymentDays					int,
+	PhoneNumber					nvarchar(20),
+	WebsiteURL					nvarchar(256),
+	DeliveryAddressLine1		nvarchar(60),
+	DeliveryAddressLine2		nvarchar(60),
+	DeliveryPostalCode			nvarchar(10),
+	DeliveryLocation			geography,
+	PostalAddressLine1			nvarchar(60),
+	PostalAddressLine2			nvarchar(60),
+	PostalPostalCode			nvarchar(10),
+	LastEditedBy				int,
+	ValidFrom					datetime2,
+	ValidTo						datetime2
+) AS NODE;
+
+-- create edge table for Sales.Orders and Sales.Orderlines
+-- LINK: CUSTOMERS -->> STOCKITEMS
+CREATE TABLE Graph.OrderLines_CustomersToStockItems (
+	
+	-- from Sales.Orders
+	OrderID						int,
+	CustomerID					int,
+	SalespersonPersonID			int,
+	PickedByPersonID			int,
+	ContactPersonID				int,
+	BackorderOrderID			int,
+	OrderDate					date,
+	ExpectedDeliveryDate		date,
+	CustomerPurchaseOrderNumber	nvarchar(20),
+	IsUndersupplyBackordered	bit,
+	Comments					nvarchar(max),
+	DeliveryInstructions		nvarchar(max),
+	InternalComments			nvarchar(max),
+
+	-- from Sales.OrderLines
+	StockItemID					int,
+	Description					nvarchar(100),
+	PackageTypeID				int,
+	Quantity					int,
+	UnitPrice					decimal(18,2),
+	TaxRate						decimal(18,3),
+	PickedQuantity				int,
+	PickingCompletedWhen		datetime2,
+	LastEditedBy				int,
+	LastEditedWhen				datetime2
+) AS EDGE;
+
+-- create edge table for Sales.Invoices and Sales.InvoiceLines
+-- LINK: CUSTOMERS -->> STOCKITEMS
+CREATE TABLE Graph.InvoiceLines_CustomersToStockItems (
+	
+	-- from Sales.Invoices
+	InvoiceID					int,
+	CustomerID					int,
+	BillToCustomerID			int,
+	OrderID						int,
+	DeliveryMethodID			int,
+	ContactPersonID				int,
+	AccountsPersonID			int,
+	SalespersonPersonID			int,
+	PackedByPersonID			int,
+	InvoiceDate					date,
+	CustomerPurchaseOrderNumber	nvarchar(20),
+	IsCreditNote				bit,
+	CreditNoteReason			nvarchar(max),
+	Comments					nvarchar(max),
+	DeliveryInstructions		nvarchar(max),
+	InternalComments			nvarchar(max),
+	TotalDryItems				int,
+	TotalChillerItems			int,
+	DeliveryRun					nvarchar(5),
+	RunPosition					nvarchar(5),
+	ReturnedDeliveryData		nvarchar(max),
+	ConfirmedDeliveryTime		datetime2,
+	ConfirmedReceivedBy			nvarchar(4000),
+
+	-- from Sales.InvoiceLines
+	InvoiceLineID				int,
+	StockItemID					int,
+	Description					nvarchar(100),
+	PackageTypeID				int,
+	Quantity					int,
+	UnitPrice					decimal(18,3),
+	TaxRate						decimal(18,2),
+	TaxAmount					decimal(18,2),
+	LineProfit					decimal(18,2),
+	ExtendedPrice				decimal(18,2),
+	LastEditedBy				int,
+	LastEditedWhen				datetime2
+) AS EDGE;
+
+
+-- create edge table for Sales.Orders and Sales.Orderlines
+-- LINK: STOCKITEMS -->> CUSTOMERS
+CREATE TABLE Graph.OrderLines_StockItemsToCustomers (
+	
+	-- from Sales.Orders
+	OrderID						int,
+	CustomerID					int,
+	SalespersonPersonID			int,
+	PickedByPersonID			int,
+	ContactPersonID				int,
+	BackorderOrderID			int,
+	OrderDate					date,
+	ExpectedDeliveryDate		date,
+	CustomerPurchaseOrderNumber	nvarchar(20),
+	IsUndersupplyBackordered	bit,
+	Comments					nvarchar(max),
+	DeliveryInstructions		nvarchar(max),
+	InternalComments			nvarchar(max),
+
+	-- from Sales.OrderLines
+	StockItemID					int,
+	Description					nvarchar(100),
+	PackageTypeID				int,
+	Quantity					int,
+	UnitPrice					decimal(18,2),
+	TaxRate						decimal(18,3),
+	PickedQuantity				int,
+	PickingCompletedWhen		datetime2,
+	LastEditedBy				int,
+	LastEditedWhen				datetime2
+) AS EDGE;
+
+-- create edge table for Sales.Invoices and Sales.InvoiceLines
+-- LINK: STOCKITEMS -->> CUSTOMERS
+CREATE TABLE Graph.InvoiceLines_StockItemsToCustomers (
+	
+	-- from Sales.Invoices
+	InvoiceID					int,
+	CustomerID					int,
+	BillToCustomerID			int,
+	OrderID						int,
+	DeliveryMethodID			int,
+	ContactPersonID				int,
+	AccountsPersonID			int,
+	SalespersonPersonID			int,
+	PackedByPersonID			int,
+	InvoiceDate					date,
+	CustomerPurchaseOrderNumber	nvarchar(20),
+	IsCreditNote				bit,
+	CreditNoteReason			nvarchar(max),
+	Comments					nvarchar(max),
+	DeliveryInstructions		nvarchar(max),
+	InternalComments			nvarchar(max),
+	TotalDryItems				int,
+	TotalChillerItems			int,
+	DeliveryRun					nvarchar(5),
+	RunPosition					nvarchar(5),
+	ReturnedDeliveryData		nvarchar(max),
+	ConfirmedDeliveryTime		datetime2,
+	ConfirmedReceivedBy			nvarchar(4000),
+
+	-- from Sales.InvoiceLines
+	InvoiceLineID				int,
+	StockItemID					int,
+	Description					nvarchar(100),
+	PackageTypeID				int,
+	Quantity					int,
+	UnitPrice					decimal(18,3),
+	TaxRate						decimal(18,2),
+	TaxAmount					decimal(18,2),
+	LineProfit					decimal(18,2),
+	ExtendedPrice				decimal(18,2),
+	LastEditedBy				int,
+	LastEditedWhen				datetime2
+) AS EDGE;
+
+
+/* WAREHOUSE schema */
+-- create node table for Warehouse.StockItems
+CREATE TABLE Graph.StockItems (
+	StockItemID					int,
+	StockItemName				nvarchar(100),
+	SupplierID					int,
+	ColorID						int,
+	UnitPackageID				int,
+	OuterPackageID				int,
+	Brand						nvarchar(50),
+	Size						nvarchar(20),
+	LeadTimeDays				int,
+	QuantityPerOuter			int,
+	IsChillerStock				bit,
+	Barcode						nvarchar(50),
+	TaxRate						decimal(18,3),
+	UnitPrice					decimal(18,2),
+	RecommendedRetailPrice		decimal(18,2),
+	TypicalWeightPerUnit		decimal(5,2),
+	MarketingComments			nvarchar(max),
+	InternalComments			nvarchar(max),
+	Photo						varbinary(max),
+	CustomFields				nvarchar(max),
+	Tags						nvarchar(max),
+	SearchDetails				nvarchar(max),
+	LastEditedBy				int,
+	ValidFrom					datetime2,
+	ValidTo						datetime2
+) AS NODE;
+
+/* PURCHASING schema */
+-- create node table for Purchasing.Suppliers
+CREATE TABLE Graph.Suppliers (
+	SupplierID					int,
+	SupplierName				nvarchar(100),
+	SupplierCategoryID			int,
+	PrimaryContactPersonID		int,
+	AlternateContactPersonID	int,
+	DeliveryMethodID			int,
+	DeliveryCityID				int,
+	PostalCityID				int,
+	SupplierReference			nvarchar(20),
+	BankAccountName				nvarchar(50),
+	BankAccountBranch			nvarchar(50),
+	BankAccountCode				nvarchar(20),
+	BankAccountNumber			nvarchar(20),
+	BankInternationalCode		nvarchar(20),
+	PaymentDays					int,
+	InternalComments			nvarchar(max),
+	PhoneNumber					nvarchar(20),
+	FaxNumber					nvarchar(20),
+	WebsiteURL					nvarchar(256),
+	DeliveryAddressLine1		nvarchar(60),
+	DeliveryAddressLine2		nvarchar(60),
+	DeliveryPostalCode			nvarchar(10),
+	DeliveryLocation			geography,
+	PostalAddressLine1			nvarchar(60),
+	PostalAddressLine2			nvarchar(60),
+	PostalPostalCode			nvarchar(10),
+	LastEditedBy				int,
+	ValidFrom					datetime2,
+	ValidTo						datetime2
+) AS NODE
+
+-- create edge table for Purchasing.PurchaseOrders and Purchasing.PurchaseOrderLines
+-- LINK: SUPPLIERS -->> STOCKITEMS
+CREATE TABLE Graph.PurchaseOrderLines_SuppliersToStockItems (
+
+	-- from Purchasing.PurchaseOrders
+	PurchaseOrderID				int,
+	SupplierID					int,
+	OrderDate					date,
+	DeliveryMethodID			int,
+	ContactPersonID				int,
+	ExpectedDeliveryDate		date,
+	SupplierReference			nvarchar(20),
+	IsOrderFinalized			bit,
+	Comments					nvarchar(max),
+	InternalComments			nvarchar(max),
+
+	-- from Purchasing.PurchaseOrderLines
+	PurchaseOrderLineID			int,
+	StockItemID					int,
+	OrderedOuters				int,
+	Description					nvarchar(100),
+	ReceivedOuters				int,
+	PackageTypeID				int,
+	ExpectedUnitPricePerOuter	decimal(18,2),
+	LastReceiptDate				date,
+	IsOrderLineFinalized		bit,
+	LastEditedBy				int,
+	LastEditedWhen				datetime2
+) AS EDGE;
+
+-- create edge table for Purchasing.PurchaseOrders and Purchasing.PurchaseOrderLines
+-- LINK: STOCKITEMS -->> SUPPLIERS
+CREATE TABLE Graph.PurchaseOrderLines_StockItemsToSuppliers (
+
+	-- from Purchasing.PurchaseOrders
+	PurchaseOrderID				int,
+	SupplierID					int,
+	OrderDate					date,
+	DeliveryMethodID			int,
+	ContactPersonID				int,
+	ExpectedDeliveryDate		date,
+	SupplierReference			nvarchar(20),
+	IsOrderFinalized			bit,
+	Comments					nvarchar(max),
+	InternalComments			nvarchar(max),
+
+	-- from Purchasing.PurchaseOrderLines
+	PurchaseOrderLineID			int,
+	StockItemID					int,
+	OrderedOuters				int,
+	Description					nvarchar(100),
+	ReceivedOuters				int,
+	PackageTypeID				int,
+	ExpectedUnitPricePerOuter	decimal(18,2),
+	LastReceiptDate				date,
+	IsOrderLineFinalized		bit,
+	LastEditedBy				int,
+	LastEditedWhen				datetime2
+) AS EDGE;
+
+go