Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 4, Problem 10HOA
Issue the commands to disable and then enable the CHECK constraint on the Base_salary column.
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9. Write a SELECT statement that uses aggregate window functions to calculate the total due for all vendors and the total due for each vendor. Return 3 Columns: The vendor id from the Invoices table. The balance due (invoice_total-payment_total-credit_total) for each invoice in the invoices table with a balance greater than 0. The total balance due for all vendors in the Invoices table. Modify the column that contains the balance due for each vendor so it contains a cumulative total by balance due.
You have been instructed to add a new student information to the students table. Because the student is new, he has no
marks before, you should not add an amount to the CGPA.
The Students table contains these columns:
Student_id NUMBER(10)
Student_name VARCHAR2(30)
Student phone NUMBER(10)
CGPA NUMBER(2,2)
Which INSERT statements will accomplish your objective?
O a. INSERT INTO students VALUES (365, 'Khalil',99554721, 0 )
O b. INSERT INTO students VALUES (365, 'Khalil',99554721, 'NO CGPA' )
O c. INSERT INTO students VALUES (365, 'Khalil',99554721, NULL )
O d. INSERT INTO students VALUES (365, 'Khalil',99554721)
Which line of code has an error?
1. CREATE TABLE FRUITS VEGETABLES
2. FRUIT TYPE VARCHAR2,
3. FRUIT NAME CHAR (20),
4. QUANTITY NUMBER (4));
O a. 1
O b. 2
O c. 3
Create a trigger named Products_UPDATE that checks the new value for the DiscountPercent column of the Products table. This trigger should raise an appropriate error if the discount percent is greater than 100 or less than 0. If the new discount percent is between 0 and 1, this trigger should modify the new discount percent by multiplying it by 100. That way, a discount percent of .2 becomes 20. Test this trigger with an appropriate UPDATE statement.
Chapter 4 Solutions
Oracle 12c: SQL
Ch. 4 - What is the difference between a PRIMARY KEY...Ch. 4 - How can you verify the constraints that exist for...Ch. 4 - A table can have a maximum of how many PRIMARY KEY...Ch. 4 - Which type of constraint can be used to make...Ch. 4 - Which type of constraint should you use to ensure...Ch. 4 - How is adding a NOT NULL constraint to an existing...Ch. 4 - When must you define constraints at the table...Ch. 4 - Prob. 8RQCh. 4 - What is the difference between disabling a...Ch. 4 - Prob. 10RQ
Ch. 4 - Prob. 1MCCh. 4 - Which of the following is not a valid constraint...Ch. 4 - Which of the following SQL statements is invalid...Ch. 4 - What is the maximum number of PRIMARY KEY...Ch. 4 - Prob. 5MCCh. 4 - How many NOT NULL constraints can be created at...Ch. 4 - The FOREIGN KEY constraint should be added to...Ch. 4 - What is the maximum number of columns you can...Ch. 4 - Which of the following commands can you use to...Ch. 4 - Prob. 10MCCh. 4 - In the initial creation of a table, if a UNIQUE...Ch. 4 - Which type of constraint should you use on a...Ch. 4 - Which of the following commands can be used to...Ch. 4 - Which of the following keywords allows the user to...Ch. 4 - Which of the following data dictionary objects...Ch. 4 - Which of the following types of constraints cant...Ch. 4 - Suppose you created a PRIMARY KEY constraint at...Ch. 4 - You’re creating a new table consisting of three...Ch. 4 - Which of the following types of restrictions can...Ch. 4 - Which of the following is the valid syntax for...Ch. 4 - Prob. 1HOACh. 4 - Prob. 2HOACh. 4 - Prob. 3HOACh. 4 - Add a column named Base_salary with a datatype of...Ch. 4 - Create a table named BOOK_STORES to include the...Ch. 4 - Add a constraint to make sure the Rep_ID value...Ch. 4 - Change the constraint created in Assignment #6 so...Ch. 4 - Create a table named REP_CONTRACTS containing the...Ch. 4 - Produce a list of information about all existing...Ch. 4 - Issue the commands to disable and then enable the...
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- The SERVICE_REQUEST table uses the CHAR data type for the DESCRIPTION and STATUS fields. Is there an alternate data type that could be used to store the values in these fields? Justify your reason for choosing an alternate data type or for leaving the data type as CHAR.arrow_forwardTask 8: Create the DEL_OWNER procedure to delete the owner whose number is stored in I_OWNER_NUM (provided as a parameter).arrow_forwardCreate a trigger named tInstructors_UPDATE that checks the new value for the AnnualSalary column of the Instructors table. This trigger should raise an appropriate error if the annual salary is greater than 120,000 or less than 0.arrow_forward
- Write an anonymous block which updates the .Physician table.(As you can not update the .Physician Table, you will have to create your own table based on the structure and contents of the Physician Table). Use named parameters to get values for Phys_ID, Phys_name, Phys_phone, and Phys_speciality. If the value for Phys_ID is in the Physician Table, Update the values of the remaining columns. If the Phys_ID is not in the Physician Table, INSERT a row into the Physician Table with those values. - Hint: Use variables for each of the columns above and assign a named parameter to each of them. Then use the variable in the rest of the block. - Write a simple driver to test the block with a Phys_ID that is in the Physician Table and a Phys_ID that is not in the Physician Table. Physician Table Phys_ID Phys_Name Phys_Phone Phys_Specialty ----------- ------------------------…arrow_forwardGot the first two, just need help with #3. Create a primary key constraint on the owner column in the owners table and make the owner_name column the primary key. This must be done before a foreign key constraint can be created on the dogs table. Create a foreign key constraint on the dogs table. The dogs table will reference the owners table through the owner_name column (a foreign key/exported key for the owner_name column in the dogs table.) Test your foreign key constraint by adding a row to the owners table and then add a row to the dogs table with the same owner_name value. Subject: MySQLarrow_forward7. Use the UNION operator to generate a result set consisting of three columns from the Products table: Discount status A calculated column that contains a value of DISCOUNTED or FULL PRICE Product_name The product_name column discount_percent The discount_percent column If the product has a discount_percent greater than 0, the Discount_status column should contain a value of DISCOUNTED. Otherwise, it should contain a value of FULL PRICE. Sort the final result set by product_name.arrow_forward
- Create a trigger named trg_char_hours that automatically updates the AIRCRAFT table when a new CHARTER row is added. Use the CHARTER table’s CHAR_HOURS_FLOWN to update the AIRCRAFT table’s AC_TTAF, AC_TTEL, and AC_TTER values. (Hint: use temp values, as the INSERT event does not accept the OLD keyword.)arrow_forwardYou have been told that you need to store the zip code for employees. Add a column to the EMPLOYEE table which will be used to store each employee’s zip code Update two rows in the EMPLOYEE table and assign a zip code (must have a WHERE clause). (you MAY use 1 or 2 statements) Write a query that includes each employee's last name, department name (not ID), and salary for each employee whose salary is less than the average for their departmentarrow_forwardPlease create this two trigger and write down as Mysql statement Create a trigger named trg_charter_time that will automatically update the AIRCRAFT table when a new CHARTER row is added. Use the CHARTER table’s CHAR_HOURS_FLOWN to update the AIRCRAFT table’s AC_TTAF, AC_TTEL, and AC_TTER values. The meaning for the AIRCRAFT table columns are as follows: AC_TTAF: Total time on the air frame (before maintenance) AC_TTEL: Total time on the left engine (before maintenance, also track single engine) AC_TTER: Total time on the right engine (before maintenance) So in the trigger, you need to decrease all of them by the number of CHAR_HOUR_FLOWN Create a trigger named trg_cust_charge that will automatically update the CUSTOMER table’s CUS_BALANCE when a new CHARTER row is added. Use the CHARTER table’s CHAR_TOT_CHG as the update source (Assume that all charter charges are charged to the customer balance.) In addition to the CHAR_TOT_CHG, add a $5 service charge for every 50 miles…arrow_forward
- Can you enter null value in a column where the Unique constraint is assigned to that column True Falsearrow_forwardWrite a SELECT statement that returns two columns basedon the EMPLOYEES table. Contact, is the employeelastname and the first initial of the first name. The secondcolumn, Phone, is the homephone without the area code.Only return rows for those employees in the 206 areacode, sort the results by the last name.arrow_forwardWrite and execute the command to retrieve the customer ID, first name, and last name of each customer in the MAJOR_CUSTOMER VIEW with a balance that exceeds the credit limit.arrow_forward
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