Entity-relationship,modeling,E education Entity-relationship modeling
Some forms of parent involvement with the school such as communications with school, volunteering, attending school events and parent--parent connections appeared to have little effect on student achievement, especially in high school. Helpi Translation jobs are undertaken by professional translators who are well versed with at least two languages.Translation can work at two levels: inter-state or regional language translation and inter-national or foreign language translation.
Entity Relation Model for Computer choice and many to much relationship is resolved from the refined ER Model below to design database solution for Computer Choice.E-R Diagram for Computer Choice Show how identified entities are related to each other and what are the attributes of each EntityThe connectivity of a relationship describes the mapping of associated entity instances in the relationship. The values of connectivity are "one" or A one-to-one (1:1) relationship is when at most one instance of a entity A is associated with one instance of entity B.For example, "employees in the company are each assigned their own office. For each employee there exists a unique office and for each office there exists a unique employee.A one-to-one (1:1) relationship is when at most one instance of a entity A is associated with one instance of entity B. For example, "employees in the company are each assigned their own office. For each employee there exists a unique office and for each office there exists a unique employee.A one-to-many (1:N) relationships is when for one instance of entity A, there are zero, one, or many instances of entity B, but for one instance of entity B, there is only one instance of entity A. An example of a 1:N relationships is A department has many employeesEach employee is assigned to one departmentA many-to-many (M:N) relationship, sometimes called non-specific, is when for one instance of entity A, there are zero, one, or many instances of entity B and for one instance of entity B there are zero, one, or many instances of entity A.An example is: employees can be assigned to no more than two projects at the same time; projects must have assigned at least three employeesA single employee can be assigned to many projects; conversely, a single project can have assigned to it many employee. Here the cardinality for the relationship between employees and projects is two and the cardinality between project and employee is three.Many-to-many relationships cannot be directly translated to relational tables but instead must be transformed into two or more one-to-many relationships using associative entities.Programming Assignment Help offers free sample assignments did by us in past. Get advantage from them first see our assignment help portfolio and second understand assignment writing tips, submit assignment for online assignment help now!
Entity-relationship,modeling,E