Dylan's BI Study Notes

My notes about Business Intelligence, Data Warehousing, OLAP, and Master Data Management

Archive for the ‘Data Lake’ Category

Schema On Read?

Posted by Dylan Wan on September 24, 2017

I saw “create external table ” first in Oracle DBMS 11G.

It was created for the purpose of loading data.

When Hive was introduced, a lot of data were already created in HDFS.

Hive was introduced to provided the SQL interface on these data.

Using the external table concept is a nature of the design.  It is not really a creative thing.

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Data Lake and Data Warehouse

Posted by Dylan Wan on April 7, 2017

This is an old topic but I learned more and come up more perspectives over time.

  • Raw Data vs Clean Data
  • Metadata
  • What kind of services are required?
  • Data as a Service
  • Analytics as a Service

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Posted in BI, Big Data, Business Intelligence, Data Lake, Data Warehouse, EDW, Enrichment, Master Data Management | Tagged: , | Leave a Comment »