Introduction to Basic Database Concepts

Databases are  used in applications or devices with software
that stores and retrieves information. Applications like
Facebook, Twitter,Instagram,Pinterest,Snapchat,Google Hotmail Mobile phones and other portable devices
all have the ability to store and retrieve data. They all are able to achieve
this using a database. Places like Banks,Hospitals,Airlines Supermarkets all
use databases to store and retrieve data or information. Things like your
Social security number ,Hospital Records number or Bank account number are all
stored in a database .

There are several concepts associated with
databases and we will explore some of them in this course. We will learn about
primary keys,foreign keys,schemas,Flat file database,hierarchial databases.

We interact with databases daily in our lives like
when we read our emails or post something on Facebook or twitter . This course will teach you the very basics of some database concepts
and the course is video based and less than1 hour.

What You Learn in this course:

• What is a Client – Server Computing

• What you will learn includes

• What is a database

• What is a Flat file database

• What is a Flat hierarchical database

• What is a RDMS

• What is a Database schema

• What is a Primary Key

• What is a Foreign key

SQL is the language used to interact with databases like Oracle  and others

SQL is a standard language for accessing and manipulating databases.

What is SQL?

SQL stands for Structured Query Language

SQL lets you access and manipulate databases

SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987

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

SQL is a Standard – BUT….

Although SQL is an ANSI/ISO standard, there are different versions of the SQL language.  However, to be compliant with the ANSI standard, they all support at least the major commands (such as SELECT, UPDATE, DELETE, INSERT, WHERE) in a similar manner.

Note: Most of the SQL database programs also have their own proprietary extensions in addition to the SQL standard!

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Frequently Asked Questions

How long do I have access to the course materials?

You can view and review the lecture materials indefinitely, like an on-demand channel.

Can I take my courses with me wherever I go?

Definitely! If you have an internet connection, courses on Udemy are available on any device at any time. If you don’t have an internet connection, some instructors also let their students download course lectures. That’s up to the instructor though, so make sure you get on their good side!