The Features Of A Relational Database

Be sure to provide a detailed explanation of relational databases along with their associated business advantages.

Employee data (names and phone numbers), project data (project name), and job data (charge per hour and project hours).

Relational Database Management Systems are probably the ones that we are most familiar with in 21st century computer science. Relational databases store

# 6: Given a physical database containing tables and relationships and business requirements, create the necessary queries.

List all variables you will use (use valid variable names). Indicate whether the data type is string, integer, or double, and so on.

A relational database is a database that consists of a collection of tables with columns showing entities, and rows showing data. This type of database uses a primary key and foreign key. The foreign key in another table will point to the primary key of a table, and this is how tables can relate to each other. This permits for one-to-one, one-to-many, and many-to-many relationship between the data. An advantage of relational databases includes the ease of adding or modifying new tables and entities without needing to change the structure of the database already in place. Relational database have many features, including indexing, setting data type, and setting validation tests, all these help to ensure data integrity.

To answer each question, darken the circle corresponding to your answer using a pencil. If you decide to change your answer, please erase your original answer completely and darken your new answer.

Data is defined as useful raw material which is intended to be useful for both the originator and for the intended receiver. Data consists largely of facts and figures ideal for communicating the intended meaning. This data can be interpreted and can be categorised as follows;

This must be in your own words and not copied and pasted from the original source. Include the purpose of the database and the subject matter it covers. This may be four or five sentences; and

Prior to designing my database, I will have a clear understanding of the data. This will allow me to determine the purpose of the database. Once all information is

Relational data is when you can put data in a computer one time and it grows

A database is an ordered collection of associated information. Database has data that is connected to each other. For example, a database that comprises information about company stock prices must not also contain information about student.

will hold attendance data for all students registered on all courses but it will be possible to

Firstly a relational database contains a set of tables which basically are linked collectively by the relationships between the tables. Also it is also known as reason such as a database is called relational database.

Databases allow us to easily store and retrieve data in a purely digital format. The strength of this is that large amounts of data can be stored and retrieved with minimal effort on the part of the user. Opposed to manually flipping through files, one can quickly pull up the requested data through a computer program. Many systems that were conventionally paper and file based have been converted to a digital format which are now stored in one or more databases.