Top Features of SQL

1. Data Definition Language( DDL)

SQL provides numerous commands, one of which is Data Definition Language( DDL).

Formal description DDL stands for Data Definition Language.

2. Data Manipulation Language( DML)

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Data manipulation language( DML) provides 4 commands

1. i) elect command

It's a veritably important command in SQL that's used to elect a set of data or information from a table or simply we can say that it's used to query information from a table.

The syntax depends upon the demand because the select command is used with different conditions and clauses.

So let’s see a introductory syntax for displaying all the information in a table

Select * fromtable_name;

Note While using the select command, the table shouldn't be empty.

1. ii) fit command

Syntax to use the insert command

fit intotable_name(column1_name,column2_name,.) values( value1, value2,.);

iii) Update command

Syntax to use the update command

Updatetable_name set

= = value2.

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Where condition;

1. iv) cancel command

Syntax to use the delete command

cancel fromtable_name where condition;

3. Relational Foundation

SQL is substantially used for relational databases. A relational database’s irregular structure provides an intuitive stoner interface, making SQL easy to learn and use. 

4. High- performance

A large quantum of data is recaptured snappily and efficiently. In addition, simple operations like fitting , deleting, and manipulating data can also be fulfilled in a short quantum of time. The reason SQL is so presto is that for a database product to be successful, it must return sets of data snappily when queried. In utmost database associations, numerous of the company’s brightest people work constantly on the query machine so it creates ‘ optimal ’ query plans that work snappily.

5. Scalability

SQL database is vertically scalable, which means that you can increase the cargo on a single garçon by adding further RAM, SSDs, or CPUs. Due to the way data is stored( related tables vs unconnected collections), SQL databases generally support perpendicular scaling only – vertical scaling is only possible for NoSQL databases.

6. Security and authentication

SQL Garçon includes several security- enabling features, including translated communication over SSL/ TLS, Windows Data Protection API( DPAPI) to encrypt data at rest, authentication, and authorization.

Authentication means a process of relating a stoner or a person grounded on their username andpassword.SQL Garçon authenticates its druggies by their credentials.

Windows authentication is the dereliction authentication system and is also known as integrated security because it's tightly integrated with Windows. Specific Windows stoner and group accounts are trusted to log in to SQL Garçon. druggies who have formerly been authenticated don't need to give fresh credentials.

Mixed- mode supports authentication both by Windows and by SQL Garçon. Usernames and watchwords are maintained in SQL Garçon.

7. seller Independence

With SQL support available from all the major DBMS merchandisers, no new DBMS product has been largely successful over the last decade. It’s possible to resettle SQL- grounded databases and programs from one DBMS to another seller’s DBMS with minimum conversion trouble. 

8. Portability across different computer systems

SQL- grounded database products support a variety of platforms similar as mainframes, PCs, workstations, specialized waiters, and indeed handhelds.

Due to this point of SQL

operations that begin on single- stoner or departmental waiters can be migrated to larger garçon systems as they grow.

It's also possible to prize and download data from commercial SQL databases into departmental or particular databases.

A prototype of a SQL- grounded database operation can be developed on an affordable particular computer before it's passed to a more expensive multiuser system.

9. IBM Countersign and Commitment( DB2)

Experimenters at IBM created SQL, which has since come a strategic product erected on IBM’s flagship DB2 database. With IBM’s original work, other database and system merchandisers followed IBM’s lead beforehand on in the development of SQL and relational databases, and as a result of IBM’s wide support and commitment, SQL was accepted more snappily by the request. In addition to IBM’s products, the SQL- grounded products it has developed run on tackle from arising challengers similar as HP and Sun.

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10. English- Like Structure

SQL is simple and easy to learn as it contains English- suchlike rulings similar as produce, elect, cancel, update, etc. In SQL databases, columns and tables can have long, descriptive names. 

11. Programmatic Database Access

Programmers use SQL to pierce databases when they write operations. In discrepancy to traditional databases in which one set of tools is for programmatic access and another for unscheduled requests, by using the same SQL statements which allow database access corridor of a program to be tested first with interactive SQL and also bedded into a program.