How to make the E-R diagram for an automobile industry?

1. What is ER diagram can you explain with example?
2. Which software is used to draw ER diagram?
3. What are the components of ER diagram?
4. How do you create an ER diagram in Word?
5. How cardinality is calculated in ER diagram?
6. What is a UML diagram in database?
7. What is ER diagram in SQL Server?
8. What are the four basic components of the ER model?
9. Which attribute in an ER diagram is underlined with dashed dotted line?

What is ER diagram can you explain with example?

An entity is an object or component of data. An entity is represented as rectangle in an ER diagram. For example: In the following ER diagram we have two entities Student and College and these two entities have many to one relationship as many students study in a single college.

Which software is used to draw ER diagram?

Adobe Illustrator. Adobe Illustrator is an excellent tool for creating ER diagrams although most users utilize it to create icons, logos, illustrators, and other graphic design elements. Creating an ER diagram is Illustrator is as simple as a walk in the park.

What are the components of ER diagram?

ER diagrams or ERD's are composed of three main elements: entities, attributes, and relationships.

How do you create an ER diagram in Word?

Go to the File menu, find Database, choose an ER diagram type and start. The ER diagram symbols library will open automatically on the left, providing a defined set of symbols commonly used in ER diagram. Drag a suitable shape for each entity or primary business concept relevant to your model.

How cardinality is calculated in ER diagram?

Crowsfeet is one of the most popular methods for creating E-R diagrams. With crowsfeet notation, cardinality is represented by decorations on the ends of lines. A cardinality of one is represented by a straight line perpendicular to the relationship line.

What is a UML diagram in database?

UML is a standard way to diagram computer systems or databases. UML helps developers visualize the relationships between different pieces of software or hardware so they can more easily plan development.

What is ER diagram in SQL Server?

An Entity Relationship Diagram (ERD) is a snapshot of data structures. An Entity Relationship Diagram shows entities (tables) in a database and relationships between tables within that database.

What are the four basic components of the ER model?

There are three basic elements in an ER Diagram: entity, attribute, relationship. There are more elements which are based on the main elements. They are weak entity, multi valued attribute, derived attribute, weak relationship, and recursive relationship.

Which attribute in an ER diagram is underlined with dashed dotted line?

The key attribute of the weak entity is represented by dashed underline. Relationship: A diamond shape is used to show the relationship between the entities. A mapping with weak entity is shown using double diamond.