SQL full form is Structured Query Language which was previously known as SEQUEL( Structured English Query Language) but still pronounced as a sequel. For students who want to become an engineer or want to pursue computer courses or anything related to the technical field, there is a complete computer courses list in which you can also learn the SQL language. In this blog, we have discussed SQL’s full form, history, uses, syntax, and why developers use SQL. And also the important commands of SQL.
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SQL Full Form
SQL is fully described as a Structured Query Language. We use this computer language to interact with a relational database. A computer database can be managed, organised, and archived data can be retrieved using SQL. Structured English Query Language, often known as SEQUEL, was the initial term given by IBM. SQL is used to submit a request for data retrieval from a database. The DBMS processes the SQL query, obtains the needed information, and then gives it back to us. Instead, SQL statements specify what data should be taken from or added to the database, as well as how a collection of data should be organised.
History of SQL
- In the year 1970, SQL was developed by Raymond Boyce and Donald Chamberlin, researchers of IBM( International Business Machines).
- Firstly SQL was known as the SEQUEL whose full form was Structured English Query Language and was developed by IBM Corporation Inc. for using Codd’s Model.
- After becoming the SQL it is still pronounced as SEQUEL.
- Later in the year 1979, SQl was first introduced by Relational Software, Inc which is now as Oracle.
Uses of SQL
- Data organisation and structure, as well as the connections between the stored data items, are defined by the data.
- Data retrieval: Data retrieval can also be done using SQL.
- Data manipulation: SQL also offers the ability for users to add new data, remove data, or edit current data.
- SQL can be used to limit a user’s capacity to add, retrieve, and alter data, safeguarding stored information against unauthorised access.
- Data sharing: SQL is used to manage data sharing between concurrent users, preventing accidental erasure of changes performed at nearly the same moment by two different users.
Syntax
| SELECT tbl.name FROM tbl WHERE tbl.name = ‘john’ |
Why do Developers Use SQL for Backend?
Because SQL (Structured Query Language) is a strong and popular language for handling relational databases, developers frequently utilise it for backend development. Moreover, it enables developers to work effectively with databases. And also allows them to carry out operations such as data storing, retrieval, modification, and querying in a simple way.
Development and also maintenance is made simpler by SQL’s declarative nature. Hence, it enables developers to declare what they want to do while letting the database engine choose how to execute the query. Additionally, SQL is a trusted and well-respected option for backend programming since it is well-documented. Also supported by many database management systems, and has been around for a long time.
Important Commands of SQL
- SELECT: SELECT command is used for extracting data from the database.
- UPDATE: The UPDATE command is used for updating data in a database.
- DELETE: DELETE command is used to delete data from a database.
- INSERT INTO: INSERT INTO command is used to insert new data into the database.
- CREATE DATABASE: CREATE DATABASE command is used to create a new database.
- ALTER DATABASE: ALTER DATABASE command is used to modify the database.
- CREATE TABLE: CREATE TABLE command is used to create a new table.
- ALTER TABLE: ALTER TABLE command is used to modify the table.
- DROP TABLE: The DROP TABLE command is used to delete the table.
- CREATE TABLE: CREATE TABLE command is used for creating an index.
- DROP INDEX: DROP INDEX command is used to delete an index.
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FAQs
Name the types of SQL commands.
The types of SQL commands are:-
1. Data Definition Language (DDL)
2. Data Manipulation Language
3. Data Control Language
4. Transaction Control Language
5. Data Query Language
What are the steps to write SQL code?
1. Firstly start your query with a select statement.
2. Secondly add the name of the fields that you want to display.
3. Thirdly add the clauses statement or selection criteria.
4. Lastly review your select statement.
By whom SQL is used?
Data scientists and also web developers use the SQL language.
