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2 Conceptual Database Design 2.3 Integrity Constraints 2.3.1 Constraint types 2.3.2 Cardinality constraints 2.3.3 Weak entities 2.4 Modeling patterns 2.4.1 Modeling historical data 2.4.2 Nary relationships

How to fill out 2 conceptual database design

How to fill out 2 conceptual database design:

1. Identify the purpose of the database: Before filling out the conceptual database design, it is essential to clearly define the purpose of the database. This involves understanding the specific requirements, goals, and functionalities the database should fulfill.
2. Define the entities and their relationships: Identify the different entities in the system and determine their relationships. Entities can be objects, people, events, or concepts that are relevant to the database. Establishing relationships, such as one-to-one, one-to-many, or many-to-many, between these entities helps in organizing and structuring the data.
3. Determine the attributes for each entity: For each entity, determine the attributes or properties that describe it. Attributes provide more detailed information about the entities and can include characteristics, properties, or measurements. Assign appropriate data types, such as text, numbers, or dates, to each attribute.
4. Establish primary and foreign keys: Primary keys are unique identifiers assigned to each entity, ensuring that each record is identifiable. Decide on the primary keys for each entity and establish relationships with foreign keys, which link the entities together. Foreign keys help maintain referential integrity and enforce relationships between the entities.
5. Define the cardinalities: Determine the cardinalities of the relationships between the entities. Cardinalities describe how many instances of one entity can be associated with another entity. This ensures accurate data representation and aids in data retrieval and manipulation.
6. Designate constraints and business rules: Identify any constraints or business rules that need to be implemented in the database. Constraints define specific conditions that data in the database must adhere to, ensuring data integrity and consistency. Examples of constraints include unique values, check constraints, and referential integrity.

Who needs 2 conceptual database design?

1. Database administrators: Database administrators need 2 conceptual database design to understand the database structure, relationships, and attributes. This knowledge helps them in managing, maintaining, and optimizing the database.
2. System analysts and designers: System analysts and designers require the conceptual database design to develop the overall system architecture and functionality. It aids in integrating the database with other components of the system and designing efficient data retrieval and manipulation processes.
3. Developers and programmers: Developers and programmers rely on the conceptual database design to implement and code the database. It provides a blueprint for creating tables, defining relationships, and assigning attributes for effective data storage and retrieval.
4. Stakeholders and end-users: Stakeholders and end-users may need to have an understanding of the conceptual database design. It allows them to comprehend the data organization and structure, facilitating effective collaboration, decision-making, and use of the database system.

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