Entity relationship diagram online

1. What is Entity Relationship Diagram with example?
2. Which app is used to draw ER diagram?
3. Is lucid chart free?
4. What does PK mean in database?
5. How do you create an entity relationship diagram in Word?
6. What is ERD in DBMS?
7. Is a relationship in ER diagram?
8. How can we identify weak entity in ER diagram?

What is Entity Relationship Diagram 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 app 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.

Is lucid chart free?

Lucidchart offers Free, Basic, Professional, and Team accounts: Free Individual: $7.95 /mo Team: $6.67 /mo Enterprise: Contact Lucid Software for pricing details. Free accounts allow users to create an unlimited number of diagrams with a limit of 60 objects per diagram.

What does PK mean in database?

Primary key (PK) - value which uniquely identifies every row in the table. Foreign keys (FK) - values match a primary or alternate key inherited from some other table. Alternate Keys (AK) - key associated with one or more columns whose values uniquely identify every row in the table, but which is not the primary key.

How do you create an entity relationship 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.

What is ERD in DBMS?

An entity relationship diagram (ERD), also known as an entity relationship model, is a graphical representation that depicts relationships among people, objects, places, concepts or events within an information technology (IT) system.

Is a relationship in ER diagram?

In ER diagram, relationship type is represented by a diamond and connecting the entities with lines. A set of relationships of same type is known as relationship set.

How can we identify weak entity in ER diagram?

Weak entity is represented by double rectangle. The relation between one strong and one weak entity is represented by double diamond. Weak entities are represented with double rectangular box in the ER Diagram and the identifying relationships are represented with double diamond.