which object describes a set of values in a table? a) A relationship b) An attribute c) An entity d) A rule
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which object describes a set of values in a table?
a) A relationship
b) An attribute
c) An entity
d) A rule
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- When part of the data in a table depends on a field in the table that isn’t the table’s primary key, it’s known as: transitive dependency partial dependency psychological dependency a foreign key1-Write the syntax to create a relational table called staff that references an object table called people that was created using an people_type. Relational Table Name staff attribute staff_id attribute department attribute person1-Write the syntax to insert into a relational table called students the address column references an object table called addresses that was created using an address_type. Other columns exist in the students table, but you are only inserting into the ones below. Aliases used should be the first letter of the table name, eg students would be s, addresses would be a Relational Table Name students attribute student_id attribute surname attribute address
- Refer to the following statement DROP TABLE IF EXISTS tb1_name; What does a statement based on this syntax do? It prevents a view being generated for a nonexistent table. It drops a table only if it does not contain a NULL value. It generates a warning about a nonexistent table. It prohibits a given table being dropped.Which of the following is the term for a cell in a relation that has no data? Group of answer choices blank value spaces empty value null valuequestion 1Create a procedure that accepts a customer id and retrieves the id of the products and quantities that the customer ordered. Use an anonymous to call the procedure and output the result. question 2Create a procedure to insert a row into the product table with appropriate valuesUse an anonymous to call the procedure and output the result. creation code
- A(n) ___________ key is a column in one table that references a primary key in another related table. A(n) ___________ source connects data-bound controls to a dataset.relation: Book (BookID, Author, ISBN, Title) Write a PL/SQL block of code that performs the following tasks: Read a Book id provided by user at run time and store it in a variable. Fetch the Author and title of the book having the entered id and store them inside two variables Display the fetched book author and title.What is the problem associated with changing the name of a table?
- **IN SQL ** 1- Write a query clause to display the internal structure of the departments table, then write a query clause to display all its data, so that the result appears as follows: ** SEE PIC ** 2- Write a query sentence to display the names, jobs, dates of appointment and employee numbers so that the employee number appears firstThe Horse table has the following columns: ID - integer, auto increment, primary key RegisteredName - variable-length string Breed - variable-length string Height - decimal number BirthDate - date Delete the following rows: Horse with ID 5. All horses with breed Holsteiner or Paint. All horses born before March 13, 2013. NOTE: Starter code has been provided. Simply change the blanks ("_") to the appropriate entity/value.4.9 LAB - Select employees and managers with inner join The Employee table has the following columns: ID - integer, primary key FirstName - variable-length string LastName - variable-length string ManagerID - integer Write a SELECT statement to show a list of all employees' first names and their managers' first names. List only employees that have a manager. Order the results by Employee first name. Use aliases to give the result columns distinctly different names, like "Employee" and "Manager". Hint: Join the Employee table to itself using INNER JOIN.
