What is a Relational Database?
A database is an application that can store and retrieve data very rapidly. The relational bit refers to how the data is stored in the database and how it is organized. When we talk about database, we mean a relational database, in fact an RDBMS - Relational Database Management System.

In a relational database, all data is stored in tables. These have the same structure repeated in each row (like a spreadsheet) and it is the relations between the tables that make it a "relational" table.

What is SQL?
SQL is short for Structured Query Language and is a simple language that provides instructions for building and modifying the structure of databases and for modifying the data stored in the tables. The main commands used to modify and retrieve data are:

Select - Fetches data.
Insert - Inserts one or more rows of data.
Update - Modifies existing row(s) of data
Delete - Deletes rows of data.

There are several ANSI/ISO standards such as ANSI 92, one of the most popular. This defines a minimum subset of supported statements. Most compiler vendors support these standards.

CGT can custom develop the following database technologies:

• Oracle
• SQL Server
• DB2
• Informix
• Sybase