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Showing posts with the label datasets

Designing Cognos Reports using Data Module Best Practices

Here are few learning to make  data module work:- It's better to create query subjects in FM with prompts. That way we can create dataset of smaller size for modeling and avoid using bulky packages. This will also enable to reduce  Always create data set names with query subject name so that easy to define data lineage Instead of using package in data module, try to use data set created based on packages. Arrange dataset in folders based on dependencies so that they can be refreshed in order. Handle nulls either FM or Data modules using package ( use clean up) before creating datasets to avoid unexpected data type errors.  It's important to define right data type for data items for specific purpose to avoid incorrect interpretation and aggregation by data module and data sets. You may need to define different layer of data module to rejoin tables so it's best to move aliases and join to FM to keep Data Module levels to 2-3. Will keep adding tips as time pe...

Cognos 11.0.8 Data set Data Lineage Issue

Datasets can be used for quick analysis and dashboard creation. We are trying to develop report using data set sourced from Package and applying filters. However, once we create a data set and reopen it, t here does not seem to be a way to pull up the properties of a specific data item to find out the source of it.  That makes it not useful for creating data modules as maintenance will be added to track field to source mapping.