What is SQL?
SQL (Structured Query Language) is a standard language designed for maintaining the data in a relational database management system. With SQL, you can easily create and manage the data, create the tables, update or modify records in the databases, etc. A database is a table that consists of rows and columns. SQL is useful to retrieve specific information from the databases that are further used for analysis.
History of SQL
- IN 1970, Dr. Codd published a paper, "A Relational Model of Data for Large Shared Data Banks" and it may have ended there.
- In 1970s, IBM researchers Raymond Boyce and Donald Chamberlin started working on SQL and they called it SEQUEL (Structured English Query Language).
- The language was created following Edgar Frank Codd's paper, "A Relational Model of Data for Large Shared Data Banks", in 1970. This became the foundation for the relational database system.
- In 1979, IBM released a system called SQL data system and in 1985, IBM released DB2, a relational database management system.
- After that Microsoft released its first version of SQL server in 1987.
Why learn SQL?
SQL is the go-to language for an engineer, business analyst, etc. which is used to communicate with the databases. Below are the main reasons why you should consider learning SQL.
- You can communicate directly with the databases.
- No need to manipulate or organize data by hand.
- Procedure or logic to solve a problem related to the database is written in SQL query and not lost in manual copies.
- You can easily fix and find the errors in your process.
- Extract the exact information from the databases that you need.
Applications of SQL
There are various applications of SQL which are also widely used to govern massive databases.
- SQL is used to create the database, characterize its structure, use it in the applications and afterward dispose of it when you are finished with it.
- SQL is used as a data manipulation language, which means you can use it for keeping up a previously existing database. Hence, it is a great tool/language to change or manipulate the data within the tables.
- SQL is broadly used as client or server language to connect the front-end with the backend which supports the customer architecture.
Advantages of SQL
SQL provides various advantages which make it popular across fields of software development. Below given are the advantages of SQL.
- A large amount of data is accessed and altered very efficiently from the database using SQL queries.
- SQL does not require a large number of coding lines to manage database systems. You can easily store and manage a large amount of data using simple SQL syntactical rules.
- SQL follows long-established standards set by ISO and ANSI which becomes easy to manage by anyone across the globe.
- The SQL language also helps in making multiple views of the database structure for different users.
If you are considering a career in Web development, depending on your specialization you'll definitely need SQL. Backend developers need SQL to manage a website's server-side programs and databases. Data analysts and data scientists use SQL to mine the data efficiently. Moreover, if you are a business analyst or strategist, SQL will help you forecast better.
There are no major prerequisites to learning SQL. Although, you should know some concepts of RDBMS, for example, database, tuple, field, etc. and just follow this tutorial to learn about SQL from the beginning. You can follow this tutorial and learn SQL very efficiently with the help of practical examples.
What This SQL Tutorial Covers?
This SQL tutorial covers all the fundamental concepts of SQL. You'll learn to create the databases, add the records to the tables, select records based on different conditions, update and delete records in a table, etc.
Once you're familiar with the fundamental topics, you'll move on to the next level that explains the method of retrieving the data from the tables using various techniques that is available in SQL.
Career Opportunity of Learning SQL
You'll get various career opportunities that align with your knowledge of SQL. Some of them are mentioned below:
- Business Analyst
- Software Engineer
- Database Administrator
- Quality Assurance Tester
- Data Scientist