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Design & ER Puzzle Parade

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Design & ER Puzzle Parade

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About this activity

Test your database design sense with ER clues.

Created by

ganesh kumar
ganesh kumar
India

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Design & ER Puzzle Parade
 

Design & ER Puzzle ParadeOnline version

Test your database design sense with ER clues.

by ganesh kumar
1

The framework used to model data and its connections.

Hints

Precedes logical schemas in database design

Often depicted with entities, relationships, and attributes.

It underpins conceptual database design.

2

A basic unit representing a person, place, thing, or concept in a database.

Hints

Found in ER diagrams as boxes

Groups similar entities together.

Could be 'customer', 'product', or 'order'.

3

A link that connects two or more entities to show how they relate.

Hints

Often labeled with the nature of the association

Can be binary, ternary, etc.

Represents interactions between entities.

4

A property that describes an attribute of an entity.

Hints

Appears as ovals in ER diagrams

Can be simple, composite, or derived.

Examples include name, age, salary.

5

A constraint specifying how many entities participate in a relationship.

Hints

A key concept in mapping relationships

Helps define the strength of association.

Determines one-to-one, one-to-many, or many-to-many.

6

A constraint indicating whether all or only some entities participate in a relationship.

Hints

Often depicted with a double line or a circle in diagrams

Affects whether foreign keys must be present.

Distinguishes total vs. partial participation.

7

An entity that cannot be uniquely identified by its own attributes alone and relies on another entity.

Hints

Common in scenarios like dependent parts or child records

Often linked via an identifying relationship.

Usually depends on an owner entity for identification.

8

A strong entity whose representation involves complex attributes.

Hints

Part of refining how attributes are stored in schemas

Contrasts with simple attributes in a strong entity

Has a primary key and may include multi-valued or composite attributes.

9

The process of converting an ER model into a set of relational tables.

Hints

A bridge from conceptual design to implementation

Transforms entities into tables and relationships into foreign keys.

Involves choosing primary keys and foreign keys.

10

An identifying link that connects a weak entity to its owner to form its identity.

Hints

Crucial for ensuring proper unique identification of weak entities

Often depicted as double lines in diagrams when needed

Used to tie a weak entity to its parent in the schema.

 
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