secret...know it yourself
A one-to-many relationship means that one row in one of the tables will relate directly to many rows in the other table.
In Database Analysis and Design; the relationship in an ERD can only be mandatory or optional between two entities. Mandatory is where both entities must be present, whereas with optional, you don't always need two entities.
When two entities can reference each other and each can contain multiple instances of the other, such a relationship is referred to as many-to-many. An example of such a relationship is a Book can contain several Authors while a given Author can write several Books. These type of relationships are modeled using an associative tables in databases.
a nonagon (non-er-gone) this website is really good for that sort of thing: .math.com/tables/geometry/polygons.htm
"You are smarter" is the correct form ("smarter" is the conventional way of saying "more smart"). This -er rule works for many other words:More tall --> "You are taller than her"More thin --> "You look thinner than you did a week ago"More smart --> "She is smarter than him"
converting er diagram to table in dbms?
Extended ER diagram is a variant of ER diagram. EER include ER diagram + hierarichal concept. Extended ER diagram is also called Enhance ER diagram(EER).
supermarket (ER-Diagram)
An ER diagram for a school management system typically includes entities such as Student, Teacher, Course, Classroom, and Enrollment. Relationships between these entities can be depicted using cardinality and participation constraints to show how they are connected (e.g., a student enrolls in courses taught by teachers in specific classrooms). The ER diagram serves as a visual representation of the database schema for the school management system.
Er diagram of on line shopping
I 'm need ER diagram for websit news
ER Diagram of online shopping
How do you draw a ER diagram for a automobile industry?
draw the er diagram for tours
You also can draw your ER diagram by so many ways. A software called Edraw is a better software to draw the ER diagram. This one has some ready-to-use ER diagrams templates conceptdraw.com/How-To-Guide/er-diagram
Er diagram of human resource managenent system
er diagram for rto management system