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Introduction to Types of NoSQL Databases
Different Types of NoSQL DatabasesTo understand the NoSQL database, let’s go through the following types, 1. Key-Value Stores
Examples: Use Cases:
2. Document Stores
Examples of Document Databases:
Use Cases:
3. Column-Oriented
Examples of Column Databases:
Use Cases:
4. Graph Network
Example of graph databases:
Use Cases:
5. Hierarchical
Examples of Hierarchical Database: Use Case:
6. Object-Oriented
Examples of Object-Oriented Database: Use Case:
7. Triple Stores
Examples of Triple Store Database:
Use Case:
Conclusion
Recommended ArticlesThis is a guide to Types of NoSQL Databases. Here we discuss the introduction and top 7 types of NoSQL Databases along with the examples and its use cases. You may also look at the following articles to learn more-
Today we are living in the Digital Era and Terabytes of data are being generated every month by all of us. This data may be in the form of text, pictures, numbers, binary codes, videos, graphs, etc. All the organizations are making use of their user data, product data, marketing data, etc to understand their businesses better and make data-driven decisions. This data is stored in databases. SQL databases were conventionally used to deal with structured data. But now data has become more complex and unstructured. NoSQL Database is attracting users from all over the world due to its exceptional behavior and Big Data distributed processing capabilities for unstructured data. In this article, we will discuss in detail NoSQL databases and their types. Table of ContentsWhat is NoSQL Database?NoSQL stands for Not only SQL. NoSQL Databases are also known as non-relational databases that don’t require a fixed schema. Users can create documents with flexible schema and can scale up evenly without much of a stretch. NoSQL information bases are largely utilized for BigData and ongoing applications. NoSQL database processes information in a distributed manner and can oblige tremendous volumes of data. Internet giants like Facebook, Google, Amazon use NoSQL databases heavily to deal with Terabytes of data daily. As NoSQL Database uses distributed storage, it is easy to scale them up horizontally with commodity hardware. In the RDBMS world, the system tends to go slow when the volume of the data increases and could be tackled by scaling up the existing hardware. However, this process is expensive and inefficient. An alternative to this problem is distributing the data load to separate commodity hardware whenever the load increases. Image Source: Guru99
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Simplify your data analysis with Hevo today! SIGN UP HERE FOR A 14-DAY FREE TRIAL!History of NoSQL DatabasesHandling SQL Databases are a time-consuming and costly task. Developers were the cost to the company rather than storage. Back in the late 2000s, NoSQL Databases emerged that changed the game of creating complex and difficult manage data models to avoid data duplication. NoSQL Databases are the perfect replacement for decreasing storage costs and increasing Developers’ costs. It optimizes the daily data management activities. Due to the decline in prices of Data Storage, a sudden surge in the demand for storage and query increased. The data came in all shapes and sizes i.e., from structured and semi-structured to polymorphic data. Defining Schema for data for all the huge volumes of data in advance in SQL databases is next to impossible. That is where NoSQL Databases handled all the demands for storing unstructured data. It helped developers store data and provide them greater flexibility. At that time Cloud Computing also came into action and the need to host applications and data on public Clouds increased. Developers wanted to distribute the data across multiple servers to make their applications and data available all the time anywhere. NoSQL Databases helped them manage all the data hassle-free. Why should you use a NoSQL Database?NoSQL databases serve as a great fit for various modern applications such as web, mobile, and gaming that need scalable, flexible, high-performance, and highly functional databases to offer great user experiences.
How Does a NoSQL Database Work?NoSQL databases leverage a variety of data models for managing and accessing data. These types of databases are optimized specifically for applications that need large data volume, flexible data models, and low latency, which can be achieved by relaxing some of the data consistency restrictions of other databases. Here’s an example of modeling the schema for a simple book database:
Features of NoSQL DatabasesNoSQL Databases offer numerous features over traditional databases. We have listed a few of the most popular features of NoSQL Databases. 1. Schemaless TablesNoSQL Databases are schema-less and can store heterogeneous data from the same domain easily. Users can quickly load complex schemas and heterogeneous data in the same NoSQL documents or tables. 2. Non-Relational StructureNoSQL Databases don’t rely on relational models, and it doesn’t store the data in flat fixed schemas. It also doesn’t support complex features like query language, integrity-joins, ACID operations, etc. The above-listed points make the NoSQL Database popular among the BigData and real-time fields. 3. Simple API ControlsNoSQL Databases offer easy-to-use API interfaces to allow low-level data manipulation. They are very well versed with REST endpoints. 4. Distributed ComputingNoSQL Databases offer distributed processing of queries along with auto-scaling and failover mechanisms. Image Source: Guru99Types of NoSQL DatabasesThere are four different categories of NoSQL Databases:
Let’s discuss each of them in detail. 1. Document DatabasesDocument Databases use key-value pairs to store and retrieve data from the documents. A document is stored in the form of XML and JSON. A typical example of the document database is shown below: Image Source: Guru99The above figure shows that the Document database contains data in JSON (or XML) format and can contain varying schema. The Documents can be nested and indexed for faster querying. Document databases allow developers to restructure their Documents based on their application requirements which may change over time. In contrast, in the RDBMS world, database administrators are required to restructure the database schemas. Examples of Document databases are – MongoDB, OrientDB, Apache CouchDB, IBM Cloudant, CrateDB, BaseX, and many more. 2. Key-Value StoresKey-value Stores are the simplest type of NoSQL Database. It uses keys and values to store the data. The attribute name is stored in ‘key’, whereas the values corresponding to that key will be held in ‘value’. In Key-value store databases, the key can only be string, whereas the value can store string, JSON, XML, Blob, etc. Due to its behavior, it is capable of handling massive data and loads. The use case of key-value stores mainly stores user preferences, user profiles, shopping carts, etc. DynamoDB, Riak, Redis are a few famous examples of Key-value store NoSQL databases. 3. Column-Oriented DatabasesColumn-oriented databases store the data in a set of columns known as column families. That means that whenever a user wants to run queries for a smaller number of columns, they can read those columns directly without consuming memories corresponding to all data. The working of the Column-oriented database is based on the concept of the BigTable paper by Google. Below schematics shows how values are stored on Column-oriented databases: Image Source: Guru99HBase, Cassandra, HBase, Hypertable are NoSQL query examples of column-based databases. 4. Graph DatabasesGraph databases form and store the relationship of the data. Each element/data is stored in a node, and that node is linked to another data/element. A typical example for Graph database use cases is Facebook. It holds the relationship between each user and their further connections. Graph databases help search the connections between data elements and link one part to various parts directly or indirectly. Image Source: Guru99The Graph database can be used in social media, fraud detection, and knowledge graphs. Examples of Graph Databases are – Neo4J, Infinite Graph, OrientDB, FlockDB, etc. Different NoSQL DatabasesHere are the different types of NoSQL databases you can leverage for your requirements:
MongoDBMongoDB is one of the most widely known document-based databases that is capable of storing documents within JSON objects. You can leverage MongoDB if you are expecting a lot of reads and write operations from your application but you don’t care much about some of the data being lost in the server crash. You can also use MongoDB when you are planning to integrate hundreds of different data sources since the document-based model of MongoDB serves as a great fit to provide a single unified view of your data. You can even use it to clickstream data and use it for customer behavioral analysis. CassandraCassandra is a popular distributed, open-source database system that was initially built by Facebook that is widely available and quite scalable. It can easily handle petabytes of data and thousands of concurrent requests per second. You can leverage Cassandra when your use case needs more writing operations as compared to reads. Cassandra also comes in handy when you need a lesser number of aggregations and joins in your queries to the database or when you need more availability and consistency. ElasticSearchElasticSearch is another distributed, open-source NoSQL database system that is highly consistent and scalable. It is also known as Analytics Engine to its users. You can easily leverage it to store, analyze, and search huge volumes of data. If the full-text search is a part of your use case, ElasticSearch would be the best fit for your tech stack. It also allows you to search with fuzzy matching. ElasticSearch can also come in handy when storing logs data and analyzing it. Amazon DynamoDBAmazon DynamoDB is a highly scalable, key-value pair distributed database system developed by Amazon. It can easily tackle 10 trillion requests per day and more than 700 companies are leveraging Amazon DynamoDB as a part of their tech stack including Lyft, Snapchat, and Samsung. If you are looking for a database that can handle various simple key-value pairs but those queries are quite large in number, then Amazon DynamoDB should be your go-to choice. If you are working with OLTP workload such as online banking or ticket booking where the data needs to be highly consistent, DynamoDB can come to the rescue. HBaseHBase is another open-source, highly scalable distributed database system in this list. HBase was penned in Java and runs on top of the Hadoop Distributed File System (HDFS). You can leverage HBase if you have at least a few petabytes of data to be processed. However, if your data volume is small, you won’t obtain the results you want. You can use HBase when you want to store real-time messages for billions of people or if your use case needs random access to the data. When Should NoSQL be Used?One should always know when to use a NoSQL Database. A few factors are listed below:
Difference between RDBMS and NoSQLThere are many differences between Relational Database Management Systems (RDBMS) and NoSQL Databases. The core difference is how the data is modeled in both of the Databases. A few key differences between RDBMS and NoSQL are listed below:
NoSQL vs. SQL: What’s the difference?Here are the primary differences between NoSQL and SQL:
Advantages of NoSQL DatabasesLet’s understand some of the advantages of NoSQL Databases:
Disadvantages of NoSQL DatabasesIn the above sections, we have discussed a lot about NoSQL databases and their benefits. However, there are certain limitations to the NoSQL database, which we have to look upon. Below are the few listed limitations:
ConclusionIn this blog post, we have discussed in-depth NoSQL databases, their types, and their advantages and disadvantages. NoSQL databases are getting popular among enterprises due to their exceptional properties. Integrating and analyzing data from a huge set of diverse sources can be challenging, this is where Hevo comes into the picture. Hevo is a No-code Data Pipeline and has awesome 100+ pre-built integrations that you can choose from. Hevo can help you integrate data from multiple sources and load them into a destination to analyze real-time data with a BI tool. It will make your life easier and make data migration hassle-free. It is user-friendly, reliable, and secure. Check out the pricing details here. VISIT OUR WEBSITE TO EXPLORE HEVOWant to take Hevo for a spin? SIGN UP and experience the feature-rich Hevo suite first hand. Share your experience with NoSQL Databases in the comments section below! |