Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 13, Problem 3HOA
Create a view called HOMEWORK13 that includes the columns named Col1 and Col2 from the FIRSTATTEMPT table. Make sure the view is created even if the FIRSTATTEMPT table doesn’t exist.
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WEEK 3 ASSIGNMENT
Complete the following exercise:
Using the student table you created in week two insert four rows into your table.
Update the first name to “Luke” and last name to “Plew” for one of the rows you inserted above.
Delete the row you updated above.
Explain how you insert data in one table from another table. Your answer should be a minimum of three sentences in length.
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- Change the CONTACT view so that no users can accidentally perform DML operations on the view.arrow_forwardCreate a new table maned “Hiking” that includes TripID, NumPersons from Reservation table and Trip Type, Trip Name columns from Trip table where Trip type is “Hiking” .arrow_forwardUse the data from the class assignment, ALTER TABLE and add two more columns Phone and email. Describe the table (show its structure) and drop the country column, describe the table (show structure). Now, create a new table based on the existing table person with the help of a subquery (The new table will contain the data from “person” table) and name the table person_self. Show its output (table created and its structure). NOTE: Use the ALTER TABLE command with ADD clause Use the ALTER TABLE command with DROPCOLUMN clause Use the CREATE TABLE command with AS (SELECT SUBQUERY) clausearrow_forward
- Add two columns to the EMPLOYEES table. One column, named EmpDate, contains the date of employment for each employee, and its default value should be the system date. The second column, named EndDate, contains employees’ date of terminationarrow_forward15. Open the AttendeeFirstName query in Design View and add criteria to select only those records where the FirstName field value begins with Lau followed by any other letters. Save the changes to the query. Open the query in Datasheet View, confirm that two records appear in the query results, and then close it.arrow_forwardRefer 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.arrow_forward
- 8. Create a trigger for the Invoices table that automatically inserts the vendor name and address for a paid invoice into a table named ShippingLabels. The trigger should fire any time the PaymentTotal column of the Invoices table is updated. The structure of the ShippingLabels table is as follows: CREATE TABLE ShippingLabels (VendorName varchar(50), VendorAddress1 varchar(50), VendorAddress2 varchar(50), VendorCity VendorState VendorZipCode varchar(50), char(2), varchar(20)); Use this UPDATE statement to test the trigger: UPDATE Invoices SET PaymentTotal = 67.92, PaymentDate = '2020-02-23' WHERE InvoiceID = 100;arrow_forwardCREATE OR REPLACE VIEW view_name ASSELECT column1, column2, ...FROM table_nameWHERE condition; in oracle the Drop view DROP VIEW view_name;arrow_forwardThe 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.arrow_forward
- Two tables are created: Horse with columns: ID - integer, primary key RegisteredName - variable-length string Student with columns: ID - integer, primary key FirstName - variable-length string LastName - variable-length string Create the LessonSchedule table with columns: HorseID - integer with range 0 to 65 thousand, not NULL, foreign key references Horse(ID) StudentID - integer with range 0 to 65 thousand, foreign key references Student(ID) LessonDateTime - date/time, not NULL Primary key is (HorseID, LessonDateTime) If a row is deleted from Horse, the rows with the same horse ID should be deleted from LessonSchedule automatically. If a row is deleted from Student, the same student IDs should be set to NULL in LessonSchedule automatically. Notes: Table and column names are case sensitive in the auto-grader. Your SQL code does not display any results in Develop mode. Use Submit mode to test your code.arrow_forwardCreate a view named MONTHLY_RENTS. It consists of three columns: the first is the number of bedrooms, the second is the average square feet, and the third is the average monthly rent for all properties in the PROPERTY table that have that number of bedrooms. Use BEDROOMS, AVG_SQUARE_FEET, and AVG_MONTHLY_RENT as the column names. Group and order the rows by number of bedrooms. 2arrow_forwardTwo tables are created: Horse with columns: ID - integer, primary key RegisteredName - variable-length string Student with columns: ID - integer, primary key FirstName - variable-length string LastName - variable-length string Create the LessonSchedule table with columns: HorseID - integer with range 0 to 65 thousand, not NULL, foreign key references Horse(ID) StudentID - integer with range 0 to 65 thousand, foreign key references Student(ID) LessonDateTime - date/time, not NULL Primary key is (HorseID, LessonDateTime) If a row is deleted from Horse, the rows with the same horse ID should be deleted from LessonSchedule automatically. If a row is deleted from Student, the same student IDs should be set to NULL in LessonSchedule automatically.arrow_forward
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