Relational Database System ( Rdbms ) Essay

One of the main components of a database is characters. Characters are letters, numbers and punctuation marks. You are using characters when you are typing a sentence for example. Another main component would be fields. Fields separate data in defined fields. When data is being entered even if you don’t have an answer for all fields a space is still left but it would be blank. If you have ever seen an excel spreadsheet that would give you an idea of how data is lined out into different fields. Records are a main database component as well. Records are a group of fields that are about one thing. An example would be social security numbers in a database of patients. Each patient would have a social security number and each social security number is in a field. That field would have the same information which is that patients social security number even though every ones is different and there would be many listed depending on how many patients was in the database. Gartee, R. (2011).

Firstly an entity is basically an entity of significance which data must be captured; also there are some examples of entities such as stock supplier and order. Furthermore in relational databases every entity is usually kept in a separate table. Also I have to make sure that put the employee details,

Tables lie in the core of any given database. Thanks to them, the possibility of redundancy is greatly reduced. A database can consist of a number of different tables which enables the researcher to break information down into smaller (and easier to analyse) pieces. Just like spread sheets, they consist of rows (also called records) and columns (fields). By using records, researchers are able to combine

Yet with all the gobs of data that exist, it is useless to us if we aren’t able to obtain and harness the information and to put it in a format that is both functional and meaningful. Typically, when most of us think of a database, we think of information organized neatly into columns and rows. This is an example of a relational database, which is how a majority of databases in the past – and still today – were structured.6 Relational databases are accessed and manipulated by a query language, most often Structured Query Language (SQL). 7 SQL is

The basic form of the data in a table consists of following four types of attributes:

Data pairs are stored as tuples within separate relations that are unique within the relation.

Relational Databases is a structural collection of records in a computer system. Relational Databases has more than one table and the tables are connected using a unique identifier for a database record. For example a library database could have three tables such as customer, books and landing.

Fact -A fact table typically has two types of columns, foreign keys to dimension tables and measures those that contain numeric facts. A fact table can contain fact’s data on detail or aggregated level.

Relational data model represents the business data in form of relations or tables. Relation is a matrix of rows and columns. Each column depicted an attribute of the entity or relation. Each row in a table is referred to as a “tuple”, which represents a single entity of the entity relation diagram.

To understand what an organization’s database requirements may be, it is vital to discern what uses can be had from a database. Databases are key in a business operation, they allow for the quick access to company data, and help to quickly sort and deliver information when needed. A few examples of the functions a database can provide for a business is the ability to track customers, their inventory, and even employees.

SQL database: store data in the table. This way is intuitive and clear. But the disadvantage is that the type of the data is determined.

Field-this is a column in a table that is constructed to store and maintain specific information about records that are stored in the table. They can include name, age and salary fields.

Databases always keep data as it stores it making the data more efficient and all the different types of data are generally categorised as a specific data type.

A relational database organizes data in the form of two‐dimensional tables. Illustrated here are tables for

It is used to describe the type of information that is to be stored in a