Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 13, Problem 4HOA
Attempt to view the structure of the HOMEWORK13 view.
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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.
15. 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.
Create a read-only view, name it as ViewD, that will contain RType and the number of rooms per RType in the ROOMS table.
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- 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.arrow_forwardEmployees table—the data Open the Employees table in Datasheet View. You should now see the data currently in the Employees table, as in Figure 19.3. Scan the data to become familiar with the kind of data being stored. In this view, you would be able to add, delete, or modify data in the table. Click the small + sign beside the employee with ID 149. What do you see? Why do you see it? (Hint: think about the relationships between the tables.) Would you expect to see + signs in either of the other two tables?arrow_forwardxplain Local Descriptor Table?arrow_forward
- Create table statements (file name must be: 1_create_table.txt). Make sure you specify primary keys and foreign keys. Specifying “not null” constraint is optional. Specifying “on delete action” and “on update action” are optional.arrow_forwardherpever applicable 2. Title field in Instructor table should allow only Mr., Ms., Mrs., Dr., Prof. as values apply check constraintsarrow_forwardThe Driver Relationship team wants to update the driving license id of an active driver: Driver ID: 2003, New Driving License ID: 1735488 In addition, the team wants to do the update over the VIEW and also want to see the actual change in the DRIVERS table. Task Update a driver's record using the ACTIVE_DRIVERS VIEW.arrow_forward
- Views: Create a view “customer_guangzhou”, it indicates the customers from the city “guangzhou”; Create a view “ordersum_goods”, it indicates the total quantity of the orders of each product (goods).arrow_forwardCREATE OR REPLACE VIEW view_name ASSELECT column1, column2, ...FROM table_nameWHERE condition; in oracle the Drop view DROP VIEW view_name;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_forward
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