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BI aims to deliver straightforward snapshots of the current state of affairs to business managers. BI analysts use data analytics, data visualization, and data modeling techniques and technologies to identify trends. and prescriptive (what should the organization be doing to create better outcomes?).
This is the most basic validation step to make sure no data has been lost or duplicated during the migration process. Column-level validation – Validate individual columns by comparing column-level statistics (min, max, count, sum, average) for each column between the source and target databases.
For traditional analytics, they are bringing data discipline to their use of Presto. They ingest data in snapshots from operational systems. Next, they build model data sets out of the snapshots, cleanse and deduplicate the data, and prepare it for analysis as Parquet files. It lands as raw data in HDFS.
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