SQL

  

SQL Tutorial- Intro

Next ❯

SQL stands for Structured Query Language, and it is a programming language used for managing relational databases. SQL allows users to create, modify, and query databases using various commands and statements.

Some of the most common SQL commands include:

        i.            SELECT: Used to retrieve data from a database table

      ii.            INSERT: Used to insert new data into a table

    iii.            UPDATE: Used to modify existing data in a table

    iv.            DELETE: Used to remove data from a table

      v.            CREATE: Used to create a new database table, view, or other object

    vi.            DROP: Used to delete a database table, view, or other object

  vii.            ALTER: Used to modify the structure of a database table or other object

 SQL is widely used in industries such as finance, healthcare, and e-commerce to manage and analyze large amounts of data. It is also an essential skill for data analysts, database administrators, and other professionals who work with databases.

The standard language for storing, modifying, and retrieving data in databases is called SQL.

1.     Structured Query Language, or SQL,

2.     You can use SQL to access and manage databases.

3.     In 1986, the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO) both recognised SQL as a standard.

How effective is SQL?

v SQL is capable of running queries against databases.

v From a database, SQL may obtain information.

v A database can have records added using SQL.

v A database's records can be updated with SQL.

v A database can have records removed using SQL.

v Create new databases using SQL.

v In a database, SQL can generate new tables.

v In a database, SQL can produce stored procedures.

v A database can have views created via SQL.

v Tables, procedures, and views can all have permissions configured via SQL.

v To be ANSI compatible, they must all support at least the major commands (such as SELECT, UPDATE, DELETE, INSERT, WHERE) in a same manner.

Some of the key features of SQL include:

1.     Ability to manage and manipulate data: SQL allows you to insert, update, delete, and retrieve data from a database.

2.     Ability to create and modify databases: SQL allows you to create and modify tables, views, indexes, and other database objects.

3.     Data integrity: SQL ensures data integrity by enforcing rules and constraints on data.

4.     Security: SQL provides security features such as access control and authentication to protect sensitive data.

5.     Portability: SQL is portable and can be used on different platforms and operating systems.

6.     Scalability: SQL is scalable and can handle large amounts of data.

 

Next ❯