Through Today's Article, We Will Give You Complete Information About What Is SQL. In This Article You Will Get To Know About What Is SQL, What Is The Full Name Of SQL, Types Of SQL, Characteristics Of SQL, SQL Commands, Uses Of SQL And Advantages And Disadvantages Of SQL.
You Must Be Visiting Many Websites On The Internet Every Day And Using Many Applications, You Must Have Also Created Your Account In Many Of These Applications. All These Details Are Stored In The Database Of The Application Or Website, These Databases Are Operated By SQL Only.
Although There Are Many Types Of Languages To Manage Databases In Computers, The Most Popular Language Among All Is SQL.
If You Do Not Know About Database, Then For Your Information, Let Us Tell You That When A Large Amount Of Data Is Stored And Kept In A Server, Then It Is Called Database.
Without Taking Much Of Your Time, Let Us Come Back To Our Topic And Start This Article What Is SQL.
What is SQL?
SQL, Whose Full Form Is Structured Query Language, Is A Type Of Computer Language Through Which Data Is Managed In Relation Database Management System (RDBMS). Database Can Be Accessed And Manipulated With The Help Of SQL.
SQL Is A Standard Language, In Which Commands Like Insert, Delete, Update Etc. Are Given To Manage The Data In The Database.
In RDMS, Data Is Stored In The Form Of Multiple Rows And Columns, SQL Is Used To Store The Data In A Well Structured Manner.
Full name of SQL
Full Form Of SQL Is “Structured Query Language”.
History of SQL
SQL Was Created In The 1970s By IBM Employees Donald D Chamberlin And Raymond F Boyce To Manage Data Stored In IBM's Relation Database System R.
Initially This Language Was Named SEQUEL But SEQUEL Was The Trademark Of An Aircraft Company Named Hawker Siddeley Based In UK, Hence Later The Name Of This Language Was Changed To SQL.
In 1978, IBM Also Started Making Commercial Products Related To SQL. RDMS Was Launched By Relation Software Inc Around 1986, Later The Name Of This Company Was Changed To Oracle.
Nowadays, Any Company That Makes Database Software Uses Its Own SQL Language, Such As –
- Microsoft's SQL language is – Microsoft SQL Server
- Oracle's SQL Language – Oracle RDBMS
- SQL Language of Open Source Platform is – MySQL
Features of SQL
The Main Features Of SQL Are As Follows –
- The Database Can Be Retrieved With The Help Of SQL.
- SQL Is Used To Insert And Control Data In RDBMS.
- With The Help Of SQL, Data Is Inserted, Deleted, Manipulated.
- With The Help Of SQL, You Can Create A New Table In The Database.
- SQL Data Query Language Is Simpler And Easier Than Other Query Languages.
Some Major Commands of SQL
Some Of The Major Commands Of SQL Are As Follows –
- CREATE – To Create A New Object In The Database.
- ALTER – To Modify The Object In The Database.
- DROP – To Delete An Object.
- SELECT – This Command Is Used To View Data From One Or More Tables.
- INSERT – This Command Is Used To Create A New Record.
- UPDATE – The Record Is Modified.
- DELETE – Deletes Data From The Database.
- GRANT – This Command Is Used To Give Permission To The User.
- REVOKE – This Command Is Used To Withdraw The Permission.
Types of SQL Statement
To Give Commands In SQL, Some Special Types Of Keywords Are Used Which Are Called SQL Statements. There Are Mainly Five Types Of SQL Statements.
1 – Data Definition Language (DDL)
Using DDL Commands, Tables Can Be Created Or Deleted In The Data, Rows Or Columns In The Table Can Be Created, Deleted Or Changed.
Examples Of DDL Commands Are – CREATE, ALTER, DROP TABLE Etc.
2 – Data Manipulation Language (DML)
Only Data Can Be Changed Using DML Commands. With The Help Of DML Commands, Data Can Be Added, Deleted And Modified.
Examples Of DML Commands Are – INSERT, UPDATE, DELETE.
3 – Data Control Language (DCL)
DCL Command Is Used To Control The Data.
Examples Of DCL Commands Are – GRANT, REVOKE
4 – DQL (Data Query Language)
With The Help Of DQL Command Any Data Is Selected In The Data.
There Is Only One DQL Command Which Is SELECT.
5 – TCL (Transection Control Language)
TCL Command Is Used With DML. With The Help Of This Command, Changes In Data Are Managed.
Some Major TCL Commands Are – SAVE POINT, COMMIT
Uses of SQL
SQL Language Is Used For The Following Purposes –
- A New Database Can Be Created With The Help Of SQL.
- Can Insert New Data In Any Database.
- Data Can Be Manipulated.
- Data Can Be Extracted From The Database.
- Can Create A New Table In The Database.
- Records Can Be Deleted In The Database.
- Similarly, All The Work Of Database Management System Can Be Done With The Help Of SQL.
Advantages of SQL
SQL Has Many Advantages That Make It Popular. SQL Is A Reliable And Efficient Language For Database Communication, Some Of The Advantages Of SQL Are As Follows –
- Large Amounts Of Data Can Be Retrieved Quickly And Efficiently In SQL. Operations Like Inserting, Deleting Or Manipulating Data Can Be Done In No Time.
- The User Does Not Have To Write A Large Number Of Codes To Retrieve Data, With The Help Of Basic Commands Like SELECT, DELETE, INSERT Etc. The User Can Easily Manage The Data.
- SQL Supports Many Types Of Database Management Systems Such As – MySQL, Oracle, MS Access Etc.
- SQL Is An Easy Language To Learn And Understand.
Disadvantages of SQL
On One Hand, SQL Has Many Advantages, On The Other Hand It Also Has Some Disadvantages Such As –
- The Interface Of SQL Is Complex Due To Which The User May Face Difficulty In Using It.
- Some Versions Of SQL Are Expensive Due To Which Many Users Do Not Use It.
Difference between SQL vs MySQL
Following Are The Differences Between SQL And MySQL –
- SQL Is A Computer Language While MySQL Is A Database Management System In Which SQL Commands Are Used.
- SQL Is A Query Language With The Help Of Which The Database Can Be Accessed Whereas MySQL Is An Open Source Database.
- Database Is Created With The Help Of SQL Whereas In MySQL, Data Can Be Inserted, Deleted And Manipulated With The Help Of SQL Query.
Conclusion:
So Friends, Through This Article Of What is SQL?, We Have Tried To Give You Complete Information About SQL Language With The Help Of Which You Can Start Your SQL Learning Journey.
We Always Try To Ensure That All The Users Visiting Our Blog Get Satisfactory Answers To Their Questions And The User Does Not Have To Go To Another Blog To Find The Answer To The Same Question.
We Hope That You Must Have Liked This Article Written By Us On SQL, Share This Article What is the Full Form of SQL? With Your Friends Who Are Interested In Programming.