Is [CLASS_CODE, CLASS_NAME, STU_NUM, STU_NAME] a Superkey? Why? Is [CLASS_CODE, CLASS_NAME, STU_NUM] a Superkey? Why? Is [CLASS_CODE, CLASS_NAME, STU_NUM] a Candidate Key? Why? Is [CLASS_CODE, STU_NUM] a Candidate Key? Why?

Q: display all fields in the JOB table sorted by the largest hourly charges for the job first

A: SELECT * will fetch you all record in table

Q: Based on the ERD below, display the assignment number, employee number and assigned hours for either…

A: Here we are joining three tables ASSIGNMENT, EMPLOYEE, and JOB and the assigned job is either 501 or…

Q: Write SQL statement that retrieve the department_name that has the maximum number of employees:…

A: The given is the requirement to find the department_name from depart table for the department that…

Q: Create a list manager names and also his supervise names if the manager has any one

A: you can try this query to get the result

Q: If  the functional dependencies are consistent with the above relation,  put TRUE. If they are not,…

A: functionally dependent defines the relationship between attributes, how they are related.  A-> B…

Q: Problem 7 Write a query to produce the total number of hours and charges for each of the projects…

A: Here you have simply used the ROUND(value,2) function. This will simply round the value to 2 places…

Q: Modify the PILOT table to add the attribute shown in the following table, with a precision and scale…

A: ALTER TABLE command is used to add new Attribute to the table Syntax: ALTER TABLE table_name  ADD…

Q: The Car Maintenance team also wants to store the actual maintenance operations in the database. The…

A: DELETE CASCADE: - When we constitute a foreign key using this option, it deletes the referencing…

Q: Course • Courseld CourseCode CourseName Capacity Instructorld 3815 ENGL862 American Literature 75 2…

A: The question requires us to write a SQL query that will return the details of instructors who teach…

Q: View 3 Seneca Courses Inc. Employee Forms All employee information for SCI is maintained on file…

A: Actually, the answer has given below:

Q: Costumer_ID Contact No Order_Total Order No COSTUMER 1 n ORDER Order Date n Name Mode_of_Payment…

A: It is evident by looking at the ERD that, there are no relationships between the attributes which…

Q: delete the record for job code 504. After completing this task examine the results with a select…

A: DELETE is command used to delete records

Q: Enclosure Number ENCLOSURE Date Type Location Size Built Animal Animal Number Species Name Gender…

A: Relationship diagram for the central zoo database is drawn below

Q: For each sale made on June 1, 2015, show the following information: CustomerID, Customer name…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: CUST_ID 78   CUST _ID 54     NAME YORK UNIVERSITY   NAME SENECA COLLEGE     LOCATION…

A: Given, CUST _ID NAME LOCATION SALES_REP 78 YORK UNIVERSITY NORTH YORK ANDRE MARTIN 54 SENECA…

Q: Customer ID Name Address Phone Card Password Usernam number number Employee

A: ERD diagram is given below

Q: Define users, giving the three groups of users there are.

A: Users A user is a person who utilizes a computer or network service. It includes expert programmer…

Fundamentals of Datawarehouse

A data warehouse is a data repository which is used to store large quantities of historical data that are mostly used for creating reports that help businesses to identify their weaknesses and strengths. For example, demographics data about people of a region can help businesses identify the needs and preferences of the region’s population. A data warehouse acts as a central storage for storing data that comes from one or more heterogenous sources. It also consists of data which can be old and of historical value. One of the most important applications of this type of system is that it is used for supporting business intelligence and data analytics applications.