Recent questions tagged er-diagram

In $\text {E-R}$ diagrams roles are indicated by labelling the lines that connect which two shapes:Diamond, DiamondRectangle, CircleRectangle, RectangleDiamond, Rectangle

What is the cardinality of this relationship? is m-n cardinality correct? if not, why?

In an $\text{ER}$ Diagram, a double ellipse is used to represent :Simple AttributeComposite AttributeDescriptive AttributeMulti-valued Attribute

In the above ER diagram how many relational table and attributes will be in respective table??

The ___________ of a relationship is $0$ if there is no explicit need for the relationship to occur or the relationship is optional. modalitycardinalityentitystructured a...

Number of entity types participating in $\text{E – R}$ diagrams is represented by $:$Degree of relationshipStructure of relationshipInstance of relationshipRole of relati...

I think it needs three tables but have lil bit confusion

What is the minimum number of relations required to represent a one-to-many relationship having total participation on the many side?Can i have just a single table with a...

What is the degree of a Recursive Relation in Er Modelling?I think its 1 since only one entity set is participating but can it be 2 since role is different for entity set...

Find minimum number of tables required for converting the following entity relationship diagram into relational database?$2$$4$$3$$5$

Set of key attributes that identify weak entities related to some owner entity is classified as:Structural keyString keyPartial keyForeign key

Considering binary relationships, possible cardinality ratios are:one:one$1:N$$M:N$All the options