Answer:
Logical Data Model
Explanation:
An Entity Relationship Diagram (ERD) is a model or a diagram designed to reveal the relationship between various entities such as people, places, objects, and so on within an institution. Entity relationship diagram is also known as Entity relationship model. This model is used to design relational database by various sectors such as education, engineering, business, etc.
<u>ERD is designed using conceptual data model, logical data model, and physical data model</u>.
The visual practice or model that gives more insight into the logical relations among the entity is the logical data model.
The logical data model is used to illustrate more detailed operational and relational data among the entities. It is more detailed than the conceptual data.
So, the correct answer is logical data model.
Answer:
Correct answer is option B (The reason for using supertypes is to minimize the number of nulls and to minimize the likelihood of redundant relationships)
Explanation:
Entity supertype
A entity supertype is a generic entity type which is related with one or more subtypes.
Use of entity supertype:
The reason for using entity supertype is to reduce redundant relationships and it is also used to minimize the number of nulls.
I’m going to assume the ? is dividing and if that’s the case X = 1
The keyword that stands not included in a single-alternative selection in visual basic exists else.
<h3>
What is single-alternative selection?</h3>
This exists the simplest decision control structure. It contains a statement or block of statements on the “true” way only. If the Boolean expression considers true, the statement, or block of statements, of the structure stands executed; otherwise, the statements exist skipped.
A dual-alternative decision structure includes two possible paths of the execution-one path is taken if the condition exists true and the other path is taken if the condition exists false. A single-alternative decision structure has only one alternative path of execution, which is handled if the condition is true.
Hence, The keyword that stands not included in a single-alternative selection in visual basic exists else.
To learn more about keywords refer to:
brainly.com/question/10712328
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