Introduction to SQL and Database with example

            Introduction to SQL and Database

What is SQL?

• SQL is a language used to retrieve and manipulate data in a RDMS.
• SQL stands for Structured Query Language.

What is a Database?

• A database is a place to store data.
• A relational database system (RDBMS) stores data in tables.

Relational Database Tables

• A relational database stores data in tables. Each table has a number of rows and columns.

• The table below has 4 rows and 3 columns.

SQL and Relational Databases

• A relational database contains tables which store data that is related in some way.

• SQL is the language that allows retrieval and manipulation of table data in a relational database.