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- Define the concept of entity integrity. Do the tables exhibit entity integrity? Answer yes or no and then explain your answer. Define the concept of referential integrity. Do the tables exhibit referential integrity? Answer yes or no and then explain your answer. Write NA (Not Applicable) if the table does not have a foreign key Create an ERD based on the Crow’s Foot model, using the database tables in Figure 1. Show the relationship's strength (weak or strong)Read carefully question numbmer (1.b) exhibit "1NF" not referential integrity or entity integrity, (Just 1NF) (Q1) Use the database shown in Figure 1.1 to answer questions a through h.(1.a) For each table, identify the primary key and the foreign key(s). If a table does not have a foreign key, write NA (Not applicable).(1.b) Do the tables exhibit 1NF? Answer Yes or No, and explain your answer for each tableUse the database tables shown to answer Problems (a) to (d) below. a) For each table in the database, identify the primary key and the foreign key(s). If a table does not have a foreign key, write None in the space provided. b) Do the tables exhibit entity integrity? Answer yes or no and then explain your answer. [6 Points] c) Create the relational diagram to show the relationships among EMPLOYEE, EDUCATION, and EMP_EDUC d) Create the Crow’s Foot ERD to show the relationships among EMPLOYEE, EDUCATION, and EMP_EDUC.
- 1.d. Describe the use of null values in a database e. What are the two requirements to ensure entity integrity? 3.d. What are the sources of business rules, and what is the database designer’s role with regard to business rules? e. Describe the three basic characteristics of Big Data databases.Create an example of a table that is in first normal form but not in second normal form using the types of entities found in the Colonial Adventure Tours database (trips, guides, clients, and reservations) and an example of a table that is in second normal form but not in third normal form using the types of entities found in the Colonial Adventure Tours database. Justify your responses in each situation and demonstrate how to convert to the higher forms.What would need to be done to fix an issue with a chasm trap? Create a direct link between the two tables rather than depend on the middle relationship. The entire database design needs to be re-evaluated. Create a foreign key for each primary key in the relationships. Remove the middle table and connect the tables directly.
- a) Referring to the company database, which relations have the same set of attributes for their default superkey and primary key? b) Referring to the company database, which relations have a reasonable candidate key that is not its primary key? C) Referring to the company database, specify an update operation to the department relation that will violate a primary key constraint constraint. D) Referring to the company database, what constraints to the database would be violated if Smith were deleted from the employee relation? Include the relevant relations and attributes in your answer.What reasons do constraints assist a business? From a business standpoint, what can occur if you don’t create a primary and related foreign keys? Refer to the KimTay Pet Supplies database. What business concerns could arise if CUST_ID isn’t a foreign key in the INVOICES table? What concerns are there if is there is not a CHECK constraint on the CATEGORY field in the ITEM table?QUESTION 7 Consider the database schema below: Company (ID: integer, Name: String (unique), Address) Department (No: integer, CompanyID: Integer, DepartmentName: String) Is it valid to have the same Company name to be repeated with two different IDs in Company relation? Yes. No, violates key constraint. No, violates entity Integrity constraint No, violates referential integrity constraint. No, violates domain constraints.