![]() This is particularly applicable to modern systems, where real-time performance is preferred over consistency. Even if one of the servers breaks down, the data can be retrieved from one of the others. This makes retrieval fast and reliable, minimizing the dependence on system failure. Unlike MySQL, NoSQL systems employ a distributed architecture that makes use of a large number of servers to mitigate size limitations and for high availability or redundancy. This means that given enough time, all updates are likely to propagate through the entire distributed system. Other examples like the Amazon Dynamo guarantee eventual consistency, which nearly, but not truly, capture all three. Many implementations of NoSQL, like Google’s BigTable, guarantee consistency and availability, but not the third attribute. NoSQL systems, on the other hand, guarantee at most two of the following three: MySQL, like all RDBMS, has built-in atomicity, consistency, isolation and durability (ACID) characteristics. Relational operations like JOIN don’t apply to such data. NoSQL databases generally treat this data as key-value pairs stored on a multitude of servers, which can be retrieved by traditional programming methods. For example, video streaming deals with large datasets that don’t necessarily follow a fixed schema. In the present Internet scenario, where large volumes of variably-structured data have to be handled quickly, new methods have been developed that focus primarily on efficient retrieval. This applies well to data that has a fixed schema, which responds uniformly to SQL commands like JOIN and GROUP BY. USE OF SQL AS QUERY LANGUAGEĪll traditional RDBMS structures, including MySQL, use versions of SQL as their query language. ![]() The following sections analyze some of the major differences between the two. The most fundamental difference between NoSQL and MySQL is that while MySQL makes use of tables for storing and retrieving data, NoSQL utilizes others means like key-value stores, document stores, BigTables (Google) and graphs. NoSQL, most commonly expanded as ‘Not only SQL’, is a family of database management models that deviates from traditional RelatIonal DBMS principles embodied by databases like MySQL. ![]()
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