Mapping of conceptual schema using the entity-relationship model into a relation schema, is achieved at the stagea.Physical-design phaseb.Logical-design phasec.Contextual-design phased.Virtual-design phase
Question
Mapping of conceptual schema using the entity-relationship model into a relation schema, is achieved at the stagea.Physical-design phaseb.Logical-design phasec.Contextual-design phased.Virtual-design phase
Solution 1
The mapping of a conceptual schema using the entity-relationship model into a relation schema is achieved at the b. Logical-design phase.
In the logical design phase, the conceptual data model is translated into a logical data model. This is where the entity types, relationships, and constraints are transformed into a relational schema. This phase is independent of the physical database system where the data will be stored.
Solution 2
The mapping of a conceptual schema using the entity-relationship model into a relation schema is achieved at the b. Logical-design phase.
Here's a step-by-step explanation:
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Conceptual Design Phase: This is the initial step in the database design process where you identify high-level data models and business rules. It involves creating an Entity-Relationship (ER) model.
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Logical Design Phase: This is the stage where the conceptual data model is translated into a logical data model. The ER model from the conceptual design phase is mapped into a relation schema at this stage. This schema is independent of the database management system and can be implemented in any DBMS.
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Physical Design Phase: This is the last stage where the logical model is converted into a physical model, which is specific to a particular DBMS. It involves creating tables, indexes, and setting up relationships between tables.
The Contextual-design phase and Virtual-design phase are not standard stages in the database design process.
Similar Questions
The designer maps the high-level conceptual schema onto the implementation data model, at the levela.Virtual-design phaseb.Logical-design phasec.Physical-design phased.Contextual-design phase
An entity-relationship diagram provides a graphical representation of thea.Schemab.Contextc.Frameworkd.Modules
n the context of database design, what is the relationship between conceptual, logical, and physical design?Question 15AnswerA.They are interchangeable terms for the same processB.Conceptual design leads to logical design, which informs physical designC.Physical design comes first, followed by logical and then conceptualD.These are completely separate processes with no relationship
Entity Relationship Diagrams are output from the following phase of Database Development:Physical Database DesignConceptual Data ModelingLogical Database DesignDistributed Database DesignReview AnswerNext
Logical Design (20 Marks) • The conceptual design to be implemented following the rules of mapping. Details of all the mapping rules to be explained in a tabular format along with the primary key, foreign key identified after the relationship is mapped. • The logical schema designed to be shown with all the files and the relationship. • For the logical schema designed, all the files required data type, size and other details to be given in a tabular format. • Logical schema designed to be shown with all the arrows to show the relationship between the parent and the child relations
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