topic Re: I Have doubt in data modeling... in QlikView

I Have doubt in data modeling...

Fri, 27 Feb 2015 08:00:44 GMT

i have tables like Orders,Products & Categories table as show in below attachment. I want to link Products & categories tables Orders table. will any one in detailed plz...

Categories and Products Table internally link with the OrderID in orders table.

Message was edited by: Ramaiah Gunti

Re: I Have doubt in data modeling...

simospa — Fri, 27 Feb 2015 08:07:55 GMT

Hi,

in your png is not clear how the three tables are linked.

So, you can structure your data model linking categories to products via categoryID, then products to orderDetails (where you would find the product ID) via productID and orderDetails to orders via OrderID.

But if you'll explain better the actual link in source tables we can be more helpful.

Re: I Have doubt in data modeling...

Anonymous — Fri, 27 Feb 2015 08:08:15 GMT

Hi Ramaiah,

Please can you upload sample data.

Regards

Neetha

Re: I Have doubt in data modeling...

Fri, 27 Feb 2015 08:22:11 GMT

Hi Ramaiah,

The scenario you shared is a case of Circular Reference. I would suggest you to read about this in Circular References

I dont see how shippers table is different from Categories table.

But to the data you gave I would suggest you to join Categories and Shippers table based on Order ID.

If you want Order Ids in two Different table to hold its uniqueness(to know which order ID is from which table) add one more column to the tables (which identify which Order ID it is). For suppose a column which holds CAT in Categories table. After this concatenate the two tables.

Finally load this table formed out of 'Categories and Shippers Table' and Orders table.

Regards.

Re: I Have doubt in data modeling...

Fri, 27 Feb 2015 09:52:18 GMT

Hi Simone Spanio,

Will u plz find new attachment

Re: I Have doubt in data modeling...

simospa — Fri, 27 Feb 2015 10:25:13 GMT

Ramaiah,

I'd do something like this:

QUALIFY *;

UNQUALIFY CategoryID, ProductID, OrderID;

Product:

SQL SELECT CategoryID,

ProductID,

ProductName,

QuantityPerUnit,

SupplierID,

UnitCost,

UnitPrice,

UnitsInStock,

UnitsOnOrder

FROM Products;

LEFT JOIN

//Category:

SQL SELECT CategoryID,

CategoryName,

Description

FROM Categories;

Order:

SQL SELECT CustomerID,

EmployeeID,

Freight,

OrderDate,

OrderID,

ShipperID

FROM Orders;

LEFT JOIN

//OrderDetail:

SQL SELECT Discount,

OrderID,

ProductID,

Quantity,

UnitPrice

FROM `Order Details`;

Let me know if it's what do you looking for.

Re: I Have doubt in data modeling...

Fri, 27 Feb 2015 13:01:39 GMT

I want data modeling like STAR Schema using this data base.

In our data base product table field (ProductID(PID)) internally connect with orderID(OID) and table field Categories table field categoryid + (ProductID(PID)) internally connect with orderID(OID). using composite key concept.will u know the procedure for this Plz slove it.

Re: I Have doubt in data modeling...

simospa — Fri, 27 Feb 2015 13:42:41 GMT

Here it is. Maybe there are other ways to do, but it works:

Orders_hr:

SQL SELECT CustomerID,

EmployeeID,

Freight,

OrderDate,

h.OrderID,

ShipperID,

ProductID

FROM Orders h

LEFT JOIN

`Order Details`

ON h.OrderID = `Order Details`.OrderID;

CategoryVsProduct:

SQL SELECT CategoryID,

ProductID

FROM Products;

Orders:

LOAD CustomerID,

EmployeeID,

Freight,

OrderDate,

OrderID,

ShipperID,

ProductID,

'x' as fakeX

Resident Orders_hr;

LEFT JOIN

LOAD CategoryID as Categories.CategoryID,

ProductID

Resident CategoryVsProduct;

drop tables Orders_hr, CategoryVsProduct;

drop field fakeX;

QUALIFY *;

UNQUALIFY OrderID;

OrderDetails:

SQL SELECT Discount,

OrderID,

ProductID,

Quantity,

UnitPrice

FROM `Order Details`;

UNQUALIFY *;

Customers:

SQL SELECT Address,

City,

CompanyName,

ContactName,

Country,

CustomerID,

Fax,

Phone,

PostalCode,

StateProvince

FROM Customers;

QUALIFY *;

UNQUALIFY ShipperID;

Shippers:

SQL SELECT CompanyName,

ShipperID

FROM Shippers;

UNQUALIFY *;

Products:

SQL SELECT CategoryID,

ProductID,

ProductName,

QuantityPerUnit,

SupplierID,

UnitCost,

UnitPrice,

UnitsInStock,

UnitsOnOrder

FROM Products;

QUALIFY *;

Categories:

SQL SELECT CategoryID,

CategoryName,

Description

FROM Categories;

Let me know if it's what you were looking for.

Re: I Have doubt in data modeling...

simospa — Fri, 27 Feb 2015 16:08:16 GMT

Ramaiah,

did it solve?

Re: I Have doubt in data modeling...

simospa — Sat, 28 Feb 2015 21:03:55 GMT

Ramaiah,

if a correct answer is given, please mark it as correct.

Thanks.