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Abstract
Relational databases (RDBMS) have led the database market since its development by Edgar Codd in 1970 (Shuxin & Indrakshi, 2005). A more recent model that has appeared in the database market is known as NoSQL and it is quickly gaining ground. The new entrant is a non-relational data store which is being deployed massively in the scaled website settings where relational database features are less needed and better-quality performance in the area of data retrieval matters. NoSQL also known as non-relational databases compliments relational databases and are now used by the world's largest organizations such as Facebook, Amazon, and Google. Both models are good in specific areas and for specific applications. Depending on what issues are to be solved by the company, it will determine the choice of a database model to be adopted. Some organizations, however, prefer to make use of a hybrid database which is the combination of both NoSQL and relational databases otherwise referred to as multi-model database. The essence of this paper is to bring to the fore the importance of this relatively new technology and clearly show its architecture. NOSQL security features will be compared with the better-known relational databases for better understanding. This review will enable ease of choice for those who have the need for such databases or facilitate the choice to embrace the trending practice of combining the two in the same application to form a hybrid database.