A schematic of the entire database that describes the relationships in a database is called a(n):

Question

BlackTom AI · Accepted Answer

An entity-relationship diagram (ERD) visually models the entities (tables), their attributes (fields), and the relationships (one-to-one, one-to-many, many-to-many) between them, so it is the correct schematic representation of an entire database’s structure and relationships.

1. Relevant knowledge points and concepts
- Entity: a real-world object or concept represented as a table.
- Attribute: a property/column of an entity.
- Relationship: how two entities are associated (cardinality and optionality).
- Schema/Conceptual model: the high-level blueprint of data organization; ERD is the standard diagrammatic representation of this.

2. Step-by-step reasoning
- The question asks for the diagram that describes relationships across the entire database.
- ERDs explicitly represent entities and the relationships among them; they are used during database design to capture the entire database schema.
- Therefore, a diagram that describes relationships across the whole database aligns exactly with the purpose and content of an ERD.

3. (No numerical calculations apply.)

4. Why the correct answer is correct
- ERDs graphically show tables/entities, their attributes, and connectors that indicate relationship types and cardinalities. This makes them the canonical “schematic of the entire database” for describing relationships.

5. Why the other options are incorrect
- Data dictionary: a catalog of metadata (field names, types, allowed values) but not a visual schematic of relationships.
- Intersection relationship diagram: not a standard, comprehensive term; typically an “intersection table” models many-to-many relationships, but it’s not the overall schematic.
- Data definition diagram: not a standard database-design artifact; may confuse with Data Definition Language (DDL) or diagrams, but not the accepted term for relationship schematics.
- Field kwy diagram (likely “field key”): not a standard name and would imply focus on keys/fields, not the full relationship model.

Conclusion: The correct answer is entity relationship diagram, which matches the provided answer.

A schematic of the entire database that describes the relationships in a database is called a(n):Single choice

Similar Questions

An ERD is:

An ERD stands for ___________________________

The above ER diagram indicates that "SSN" is the primary key of "Employee".

ER diagram is used for conceptual data modeling.

A schematic that describes the manner in which two tables are related to one another in a database is called a(n):

请描述学生与在学人员之间的关系

Describe the relationship between DEPARTMENT and TEACHER

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler