Whether you run a small business or a big corporation, you have to handle large amounts of data. Data needs to be stored and organised safely. All staff should also be able to access and retrieve relevant data whenever they need. Hence, databases are an integral part of a business, no matter the industry they work in.
A database is an organised collection of data stored in a computer. In other words, a database is like an electronic filing system. It allows you to access, manage, update, or alter your data. How does this system work? This article will serve as your beginner’s guide to databases, what they are, and how they work.
What are databases for?
Databases are used for storing, organising, accessing, and managing important information. A person or a company can use the information to manage an application or a business transaction. Then, you can see trends and insights that can benefit the business. Data storage systems also have encryption and security measures to ensure your important information remains private.
The structure of a database varies widely, but in general, it includes five main components:
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Hardware: The physical computers, devices, and storage systems that run data processing software.
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Software: The management system that allows users to access data.
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Data: The actual information stored in databases.
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Data access language: A programming language used by the software to manage data. Users use this language to write commands and queries.
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Procedures: Each data management software has a set of rules that users must follow in order to access and organise data.
Types of databases
Organisations use different types of systems to manage big data and support various applications. One of the most common types is the navigational database. This system stores data in sets of linked records. Users must navigate these records to find the data they want. Furthermore, the navigational data system has two common types: hierarchical and network databases.
A hierarchical data system arranges data in a parent-child relationship. A child record can only have a single parent, but a parent record can have multiple children. To find the information they want, users must start at the top of the order. A network data system behaves like a hierarchical one, but it allows a child data to have multiple parent data. Aside from these two, there are other common types of databases.
Relational databases
This kind of system is often called an SQL database because it usually supports Structured Query Language (SQL) to query and alter data. This system arranges data in tables. Each table contains information on one type of entity. For example, a business has a table containing information on its customers, divided into age groups. The table then lists each age group’s buying habits.
Non-relational databases
This is an umbrella term to describe systems that don’t store data in a rigid format. Another name for this system is NoSQL because they don’t usually need SQL to navigate. You can use this system for unstructured and semistructured data types like free-form text and images. Some common types of NoSQL databases include:
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Graph: Here, data is stored as “nodes” to represent entities and “edges” to represent relationships between them.
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Document: Data is stored as documents in different formats, such as JSON, XML, and BSON. This kind of system is common in content management systems (CMS).
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Key-value: Here, information is stored as pairs of keys and values. Keys are unique identifiers, while values are arrays of data.
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Wide-column: Data is stored in rows and columns like relational databases. However, each row can have its own set of columns that store different information from other rows.
Object-oriented databases
This system stores information as objects, which are bundles of information that have code associations. Each object represents an entity and has class groups. They have attributes that describe their traits and methods that describe behaviour. For example, an object in the “cat” class has the attributes “color” and “weight”. They have the methods “purr” and “hunt” to describe their behaviour.
How databases work
Databases work by allowing users to store information in structured or unstructured formats. It has a data storage system, which houses data physically or logically. Then, users can alter the data through a software programme. To interact with data, you use languages like SQL, OQL, and XQuery. Each language works for different types of systems.
A database management system (DBMS) makes this process easier. When you store a physical file in a filing cabinet, you need to know the exact location of the file in order to access and alter it. With DBMS, you can do this without knowing precisely where the data is. A DBMS also helps strengthen data security by enforcing access controls and tracking user activity.
Utilising databases for work and life
Databases are crucial to many tools and applications that people use in everyday life. For example, a banking app tracks transactions, and a social media app studies user behaviour. Businesses in many sectors also rely on this technology to manage vast data on their customers. When you store photos, videos, and documents in personal cloud storage like Google Drive or Cloud, you are also using a database!
As businesses grow, they must compile large amounts of information, too. This comes with a lot of challenges. Companies demand powerful technology where they can store and retrieve big data quickly and easily. The databases need to be scalable and grow alongside the increase in data. Since a lot of company information is classified, they also need to have the utmost security.
The world of data is always evolving, so demand for data scientists, analysts, and engineers will always increase. If you want to take part in building powerful databases, now is the time to learn the necessary skills. The College of Contract Management is ready to aid you with affordable online courses in IT & Software. Whether you want to upgrade your data skills or you’re just starting out, enrol today to be a part of an ever-growing industry!
