Introduction
Basically, what an SQL and NoSQL database does is help you store and manage your data efficiently. But how are these two different? Before doing a comparison between these two, let’s understand what exactly is an SQL database and a NoSQL database.
What is an SQL Database?
Introduced in the 1970s, SQL or Structured Query Language is a standard way of interacting with relational databases. Relational databases store data in the form of tables, and include rows and columns. Relational databases use primary and foreign keys to connect them. SQL databases are a perfect choice if you are looking to manage consistent, structured data. It is also great to perform complicated transactions and queries.
What is a NoSQL Database?
Introduced in the 1960s but came to fame in the early 21st century, NoSQL, or Not only SQL stores and retrieves data in different forms such as graphs, documents, key-value pairs, columns, etc. It basically covers various non-relational databases. Unlike the typical tabular structure of a relational database, NoSQL databases store data inside one data structure. NoSQL databases are perfect for managing dynamic, unstructured data. It is also great for horizontal scaling and distributing data across multiple servers. NoSQL databases are regularly used in big data and real-time web applications.
Fundamental Difference between SQL Database and NoSQL Database
| SQL Database | NoSQL Database |
|---|---|
| Relational Database | Non-relational Database |
| Predefined Schema | Dynamic Schema |
| Vertical Scalability | Horizontal Scalability |
| Follows ACID properties | Follows Brewers CAP theorem |
| Examples:MySQL, PostgreSQL, Oracle, MS-SQL Server, etc | Examples:MongoDB, GraphQL, HBase, Neo4j, Cassandra, etc |
Let’s look at the major differences between SQL and NoSQL Databases.
Type
SQL Database is a relational database management system whereas NoSql is a non-relational database or distributed database management system.
Structure
SQL databases store data in table form including rows and columns. It stores data in a structured form. However, on the other hand, NoSQL databases are present in different forms such as documents, graphs, wide-column stores, key-value pairs, etc.
Schema
SQL databases have a predefined schema and use a structured query language (SQL). On the other hand, NoSQL databases have dynamic schemas for unstructured data.
Also Read: Most Popular Databases in 2023
Scalability
SQL databases are vertically scalable. What it means is that you can raise the load on a single server by increasing CPU, RAM, or SSD. On the contrary, NoSQL databases are scalable in a horizontal manner. With a NoSQL database, you can manage more traffic by sharding. You can also add more servers to your NoSQL database. This makes NoSQL more powerful. Thus, making it to be the preferred choice for ever-evolving large data sets.
Followed Properties
SQL databases use Atomicity, Consistency, Isolation, and Durability properties or ACID properties. On the other hand, the NoSQL database follows the Consistency, Availability, and Partition tolerance properties, that is, the Brewers CAP theorem.
Support
The vendors of SQL databases extend great support while deploying and managing it. However, for some NoSQL databases, you still have to rely on community support. There are a few vendors or consultants with expertise in setting up or deploying large-scale NoSQL databases.
Use Cases
SQL databases are a great choice for multi-row transactions. On the other hand, a NoSQL database is better for unstructured data including documents or JSON.
SQL databases are also generally used for legacy systems developed around a relational database structure.
You can make use of an SQL database for applications with several attached operations. SQL schema helps you determine ACID properties and enhance data compatibility. These databases are a great pick if you have to quickly look for data from the database without any hassle.
On the other hand, a NoSQL database is perfect for applications with active and dynamic data not including any attached operations. NoSQL is also perfect for applications with missing data sets that will not affect business efficiency.
Rajni
Before doing a comparison between SQL vs NoSQL Databases, let’s understand what exactly an SQL database is and a NoSQL database.
PublishedSeptember 25, 2023
CategorySQL vs NoSQL Databases comparison
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