SQL is used to store and manipulate data in databases. It is used to create, store, edit and retrieve data from a database. Users must have access to a database in order to use SQL commands. SQL can be used to create, modify and delete tables. It is also used to insert, update and delete records in the tables. SQL can be used to retrieve data from the database.

Top SQL Courses in 2024

Q: 2. What are the applications of SQL?

SQL has applications in almost every field nowadays. It can be used where a person is working on data and he needs to manipulate it in any way. Some of the examples of fields where people use SQL for manipulating data can be seen here: 1. Medicine: SQL is used in the medical field for storing medical records and for extracting it and keeping it in the database. 2. Law: SQL is used in law firms for storing the information about their clients, case files, etc. 3. Finance: Finance is one of the fields where SQL is used in a big way. It is used in stock exchanges, financial institutes, etc. In every field, data needs to be collected and stored. SQL can be used to store and manipulate that data. The data can be kept in a database, which is a collection of information. SQL is used in database management. It's one of the most useful languages out there.

Q: 3. What are the limitations of SQL?

SQL is a client-server technology. Its nature is such that it is limited to the database server on which it is installed. So, there is no possibility of integrating data between different databases or even with other servers. If a database is located in multiple servers, then it is possible that SQL Server may not be able to access it. Still another limitation of SQL Server is that it uses a single set of processes to manage all data of the server. This tends to become a problem when a database is mission-critical and requires round-the-clock access.

By Rohan Vats

Updated on Feb 26, 2025 | 5 min read | 6.6k views

SQL is specially designed for accessing and manipulating databases. Over the course of the past few years, SQL has garnered immense popularity in multiple domains, including database administration, backend web development, Data Science, and Business Intelligence (BI). These fields involve storing and retrieving colossal volumes of data for data analysis, which makes SQL skills a must.

Data Science uses tools to derive, mine, and analyze data to solve business problems. SQL is a querying language tool that works on manipulating and handling relational databases to manage and analyze the data in specific methods- seeking to extract fruitful results.

It is an efficient management system aimed at simplifying the tedious process of extracting data from the mountainous pile of databases by plating the role of a language communicator between the human operating the collection and the computer system carrying the load. The commands are the language inputs that the other end of the software understands.

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There are various SQL courses that are available online that can help in enhancing one’s skills and increasing their chances to make a fruitful career.

The Best SQL Courses

Here’s a list of best SQL courses online for you, that are available and are curated by:

upGrad
Linkedin
Microsoft

upGrad provides you with an array of diverse and excellent courses ranging from Data Science and Deep Learning to DBA and MBA, to Business analytics, and so much more.

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1. SQL Essential Training Online Class

This course is facilitated by Bill Weinman, a tech advocate, entrepreneur, programming expert. The course explains all the major features of SQL i.e., creating tables; defining relationships; manipulating strings, numbers, and dates; using triggers to automate actions, and using sub-selects and views. This course offers a solid working knowledge of the language and demonstrates how to retrieve and manage data efficiently, and it also includes 11 chapter quizzes.

2. Welcome – Learning SQL Programming Video Tutorial

This course provides an introduction to core programming languages such as SQL Server, MySQL, MariaDB, and PostgreSQL. It is facilitated by Scott Simpson, a creator of technology courses as an author at LinkedIn.

The course demonstrates how to request data from a server, limit and sort the responses, aggregate data from multiple tables with joins, and edit and delete data. Instructor Scott Simpson also explains how one can perform simple math operations and transform the data into different formats.

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3. SQL for Non-Programmers Online Class

Julianne Thouin is the instructor for this beginner-level course. This course covers basic concepts of relational database design and explains how to write simple select statements using joins and proper filtering. The course elaborates on SQL server is and what is it used for. The course also includes 4 chapter quizzes.

Apart from these courses, there’s also a Microsoft course on SQL:

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4. Course 10985-C: Introduction to SQL Databases – Learn

This is a three-day instructor-led SQL course that is aimed at individuals looking to move into a database professional role or whose job role is expanding to encompass database elements. This course defines fundamental database concepts including database types, database languages, and database designs.

Since this is a foundation-level course, the only stringent eligibility criteria for this course is that you must have general computer literacy.

The course is divided into six modules, these are:

Module 1- introduction to databases
Module 2: Data Modelling
Module 3: Normalization
Module 4: Relationships
Module 5: Performance
Module 6: Database objects

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Conclusion

The current times are a perfect opportunity to capitalize on the expanding career in Data Science! The demand for software developers/backend engineers is going up steadily, there are not adequate resources to meet the demand.

This a golden opportunity to upskill and master SQL for your benefit!

If you are interested in developing a successful career in data science and SQL, you can opt for any of these online SQL courses to expand your knowledge and skills.

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