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"Good Data"
Cultivating culture that emphasizes consistency and reusability is vital when introducing successful data governance practices. Common problems with many decision support systems are the amount of variation, redundancy and overlap that exists within the data models and business logic used across multiple analytical applications. These problems can delay critical decisions and disrupt IT operations while users struggle to verify the truth in data. Having data is one thing, having “good data” is another. With the volume of data increasing it is important to create a structured and consolidated data management layer that contains reusable and consistent definitions. This in turn gives developers and business users assurance that the data they are using, whether to develop applications or make decisions, is “good data”. It also expedites the process of creating new applications and eliminates much of the guesswork in maintaining applications as business requirements evolve over time.
Storing and Reusing QlikView Expressions
Using QlikView Expressor (QVE) to manage and prepare data for QlikView is a great step towards adding data governance and data management to your QlikView deployment. Not only can you visualize where data originates and its final destination, but you can also create reusable parameterized business rules that can be shared across multiple applications.
By design QVE uses a Transform Operator to store Expression and Function rules to manipulate and add data. When transforming data - a simple QVE expression is used. The results yield transformed and/or new data columns to be used in the final output of the QlikView table model.
But what if you want to store and reuse an actual QlikView specific scripted expression and not just the resulting column output? This would be an ideal method to reference a single version of that expression in a unified manner. In turn it could reduce maintenance significantly if changes are made since there is only one place to make modifications, QlikView Expressor. This approach would also increase productivity and data confidence as it creates a single common expression stored in a centralized reusable repository.
Want to learn more and see it in action? Download the complete document and sample below.
If you are viewing this from http://community.qlik.com/blogs - you must click this link to get the sample:
(http://community.qlik.com/blogs/qlikviewdesignblog/2013/04/24/defining-qlikview-expressions-with-qli...)
The document is also available here: http://community.qlik.com/docs/DOC-4214
Regards,
Michael Tarallo - Senior Product Marketing Manager
Bill Kehoe - Product Manager and founder Expressor