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How does SQL Database work ?

Published By Nilesh
Aswin Vijayan
Approved By Aswin Vijayan
Published On July 6th, 2019
Reading Time 3 Minutes Reading

First of all, you should know what is SQL Database? SQL stands for Structured Query Language. It is a standardized programming language used for managing relational databases and by performing various functions communicates with a database. There are many databases that support the use of SQL to access their data, among them MySQL and PostgreSQL. SQL programming can be effectively used to insert, search, update, delete database records. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. Some common relational database management systems that use SQL are Oracle, Sybase, Microsoft SQL Server, Access, Ingres, etc. Although most database systems use SQL.


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History of SQL Database

SQL was initially developed Boyce in the early 1970s by IBM Donald D. Chamberlin and Raymond F. This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored. which a group at IBM San Jose Research Laboratory had developed during the 1970s. The origins of the SQL take us back to the 1970s when in the IBM laboratories, new database software was created – System R. and to manage the data stored in System R, the SQL language was created. At first, it was called SEQUEL, a name which is still used as an alternative pronunciation for SQL but was later renamed to just SQL. In 1979, a company called Relational Software, which later became Oracle, saw the commercial potential of SQL and released its own modified version, named Oracle V2.

You Should Know What Can SQL Do?

  • SQL can execute queries against a database
  • SQL can retrieve data from a database
  • SQL can insert records in a database
  • SQL can update records in a database
  • SQL can delete records from a database
  • SQL can create new databases
  • SQL can create new tables in a database
  • SQL can create stored procedures in a database
  • SQL can create views in a database
  • SQL can set permissions on tables, procedures, and views

Basic SQL Commands

  • SELECT – extracts data from a database
  • DELETE – deletes data from a database
  • UPDATE – updates data in a database
  • ALTER TABLE – modifies a table
  • DROP TABLE – deletes a table
  • CREATE TABLE – creates a new table
  • CREATE INDEX – creates an index (search key)
  • DROP INDEX – deletes an index
  • INSERT INTO – inserts new data into a database
  • START TRANSACTION – is used to begin a transaction.
  • COMMIT – is used to apply changes and end transaction
  • ROLLBACK- is used to discard changes and end transaction.
  • REPLACE – is used when you want to add or change (or replace) new or existing data.
  • TRUNCATE – is used when you want to empty (or delete) all data from the template.

Previous and Latest Updates Available For Each SQL Server Version



This blog is full of all the basic information about SQL and how does SQL database work? The Structured Query Language database is a computer language designed for the retrieval and management of data. The updated basic commands and previous, latest SQL versions query would help you to improve your basic knowledge of SQL Database.