NoSQL Database vs. Relational Database

NoSQL comparison Relational DatabaseRelational database management systems (RDBMS) have been very effective in managing transactional data. The Atomicity, Consistency, Isolation, and Durability (ACID) properties of relational databases have made them a staple for enterprises looking to manage data that spans various critical business functions. Examples include Enterprise Resource Planning (ERP), Customer Relationship Management (CRM), data warehouse, and a multitude of similar applications.

The Oracle Database has a 30-year legacy of high performance, scalability, and fault tolerance. Enterprise customers demand a high level of security, disaster recovery capabilities, and rich application development functionality. Relational databases, like the Oracle Database, provide a very comprehensive functionality to manage a multitude of data types and deployment options. These capabilities result in a rich and complex database engine.

NoSQL databases were created at the other end of this spectrum; their primary goal was to provide a very quick and dirty mechanism to retrieve information without all the varied capabilities of the RDMBS that we have highlighted in the preceding paragraph. NoSQL databases are highly distributed, run on commodity hardware, and provide minimal or no transactional support; they also have a very flexible or nonexistent schema definition requirement, and this makes them very suitable for fast storage, retrieval, and update of unstructured data. NoSQL databases have developed into a very lightweight, agile, developer-centric, API-driven database engine. NoSQL database developers are comfortable using low-level APIs to interact with the database, and don’t rely on higher-level languages such as SQL (Structured Query Language), which is a standard for an RDBMS.

 

It is recommended that NoSQL databases be used for high volume, rapidly evolving datasets, with low latency requirements, and where you need the complete flexibility of its APIs to develop a very specialized data store. An RDBMS has enterprise-grade features for high availability and disaster recovery, which are essential for transactional systems. When availability requirements are more flexible and the possibility of data loss or consistency can be tolerated, NoSQL databases prove to be a cost-effective solution. Also, applications that require a very efficient mechanism to retrieve individual records without the need for operations such as complex joins will also benefit from the use of the Oracle NoSQL Database. NoSQL databases make efficient use of commodity servers and storage; they do not rely on specialized hardware and can scale to thousands of servers and hence can manage petabytes of data with very good scalability characteristics.NoSQL comparison Relational Database

Both RDBMS and NoSQL databases provide significant benefits in their individual use case scenarios. It is therefore very important to choose the appropriate technology based on the need, and it is also critical to realize that the two can complement each other, to provide a very comprehensive solution for big data.

While it is critical to choose a NoSQL technology that meets your specific use case scenario, may it be key-value pair, graph, or document store (terms explained in the next section), it is also important to realize that like any other data management technology, NoSQL databases do not operate in a vacuum. Choose a NoSQL database implementation that integrates very well with data ingestion tools, RDBMS, Business Intelligence tools, and enterprise management utilities. Such an integrated NoSQL database will allow you to combine information across different database types, and data types (structured and unstructured), resulting in a big data deployment that brings tremendous value to your enterprise.

 

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