Oracle (NYSE: ORCL) first introduced its relational database (the one that can be visualized in tables of rows and columns) in the late 1970s.

While the Oracle database served user needs for decades, the nature of data has changed as computing capabilities have increased. That need prompted MongoDB (NASDAQ: MDB) to introduce Atlas, a non-relational database that can store unstructured data types.

However, Oracle responded by introducing its own non-relational database. It has also pivoted into the fast-growing cloud infrastructure business. Does this response mean that Oracle is still a better software-as-a-service (SaaS) stock for investors, or should they buy MongoDB as it spearheads a major shift in the industry?

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Source Fool.com