I recently read a good buyer’s guide from AtScale: The Buyer’s Guide to the Best Semantic Layer Tools for Data and Analytics. I think the buyer’s guide is fair not because that the company I worked for also has such semantic layer, but I really feel that the drawback of the vendor specific semantic layer has a unnecessary vendor lock-in and the design is not customer-oriented.
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Semantic Layer for Data Scientist
Posted by Dylan Wan on June 16, 2022
Posted in BI, Data Science | Tagged: Incorta | Leave a Comment »
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.
Posted in Big Data, Data Lake, Data Science, Oracle | Tagged: Data Mining, Data Warehouse | Leave a Comment »
Dylan's BI Study Notes 