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IBM Watson Query on IBM Cloud Pak for Data lets you query across databases, data warehouses, and data lakes. Watson Query connects multiple data sources into a single self-balancing collection of data sources or databases. Imagine what you could do with all your customer data in one place!
You can combine tables from multiple sources that are similar into a single virtual table. You can segment either a subset or superset of columns to create your virtual table. Then, you can run queries against the resulting virtual table the same way that you would query any of the base tables.
If you want to understand the quality of your data, you can also assign virtualized data to an analytics project. Then, go to the project and run Metadata Import and Metadata Enrichment against the virtualized data assets. You will be able to see the data quality in the details of your virtualized data assets.