iconDatabase Design

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  • Mascot Business Solutions is a leading name in detabse designing since 2005. Our company had gain lot of positive feedback from our lot of worldwide satisfied clients. Our clients not only speak, they provide us refrences as per their possibilities. Mascot Business Solutions have latest cocept of detabase design to generate futuristic quality for our clients.

  • Before getting detabse design services from anywhere You must knor about detabase design that are explained below :

  • Database design is the process of producing a detailed data model of a database. This logical data model contains all the needed logical and physical design choices and physical storage parameters needed to generate a design in a Data Definition Language, which can then be used to create a database. A fully attributed data model contains detailed attributes for each entity.

  • The term database design can used to describe many different parts of the design of an overall database system. Principally, and most correctly, it can be thought of as the logical design of the base data structures used to store the data. In the relational model these are the tables and views. In an object database the entities and relationships map directly to object classes and named relationships. However, the term database design could also be used to apply to the overall process of designing, not just the base data structures, but also the forms and queries used as part of the overall database application within the database management system (DBMS).

  • The process of doing database design generally consists of a number of steps which will be carried out by the database designer.

  • Usually, the designer must:

  • Determine the relationships between the different data elements.

  • Superimpose a logical structure upon the data on the basis of these relationships

  • Database design also include ER(Entity-relationship model) diagram. ER diagram is diagram help to design database in effective and efficient way.

  • Example of ER diagram which is used for database design:

  • Attributes in ER diagrams are usually modelled as an oval with the name of the attribute , linked to the entity or relationship that contains the attribute.

  • Within the relational model the final step can generally be broken down into two further steps, that of determining the grouping of information within the system, generally determining what are the basic objects about which information is being stored, and then determining the relationships between these groups of information, or objects. This step is not necessary with an Object database.

  • The Design Process

  • The design process consists of the following steps :

  • Determine the purpose of your database - This helps prepare you for the remaining steps.

  • Find and organize the information required - Gather all of the types of information you might want to record in the database, such as product name and order number.

  • Divide the information into tables - Divide your information items into major entities or subjects, such as Products or Orders. Each subject then becomes a table.

  • Turn informatio n items into columns - Decide what information you want to store in each table. Each item becomes a field, and is displayed as a column in the table. For example, an Employees table might include fields such as Last Name and Hire Date.

  • Specify primary keys - Choose each table’s primary key. The primary key is a column that is used to uniquely identify each row. An example might be Product ID or Order ID.

  • Set up the table relationships - Look at each table and decide how the data in one table is related to the data in other tables. Add fields to tables or create new tables to clarify the relationships, as necessary.

  • Refine your design - Analyze your design for errors. Create the tables and add a few records of sample data. See if you can get the results you want from your tables. Make adjustments to the design, as needed.

  • Apply the normalization rules - Apply the data normalization rules to see if your tables are structured correctly. Make adjustments to the tables, as needed.

  • Types of Database design :

  • Conceptual schema

  • Logically structuring data

  • Physical database design