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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. What is true about updates through a view?

A) You cannot update a view with group functions.
B) When you update a view group functions are automatically computed.
C) When you update a view the constraints on the views always override the constraints on the underlying tables.
D) When you update a view only the constraints on the underlying table will be in effect.

2. You need to display the last names of those employees who have the letter "A" as the second character in their names.
Which SQL statement displays the required results?

A) SELECT last_name FROM EMP WHERE last name LIKE '*A%'
B) SELECT last_name FROM EMP WHERE last name ='*A%'
C) SELECT last_name FROM EMP WHERE last_name LIKE '_A%';
D) SELECT last_name FROM EMP WHERE last name ='_A%';

3. You need to create a table named ORDERS that contain four columns:
1.an ORDER_ID column of number data type
2.a CUSTOMER_ID column of number data type
3.an ORDER_STATUS column that contains a character data type
4.a DATE_ORDERED column to contain the date the order was placed.
When a row is inserted into the table, if no value is provided when the order was placed,
today's date should be used instead.
Which statement accomplishes this?

A) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status NUMBER (10),
date_ordered DATE = SYSDATE);
B) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status NUMBER (10),
date_ordered DATE DEFAULT SYSDATE);
C) CREATE OR REPLACE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE = SYSDATE);
D) CREATE OR REPLACE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE DEFAULT SYSDATE);
E) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE = SYSDATE);
F) CREATE TABLE orders (
order_id NUMBER (10),
customer_id NUMBER (8),
order_status VARCHAR2 (10),
date_ordered DATE DEFAULT SYSDATE);

4. Which two tasks can your perform by using the TO_CHAR function? (Choose two)

A) Convert 10 to '10'
B) Convert a date to a character expression
C) Convert 'TEN' to 10
D) Convert 10 to 'TEN'
E) Convert a character expression to a date
F) Convert '10' to 10

5. Examine the structure of the EMPLOYEES table:
EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID NUMBER\ SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the
DEPARTMENTS table
You created a sequence called EMP_ID_SEQ in order to populate sequential values for the EMPLOYEE_ID column of the EMPLOYEES table.
Which two statements regarding the EMP_ID_SEQ sequence are true? (Choose two.)

A) The EMP_ID_SEQ sequence is not affected by modifications to the EMPLOYEES table.
B) You cannot use the EMP_ID_SEQ sequence to populate the JOB_ID column.
C) The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEE_ID column.
D) Any other column of NUMBER data type in your schema can use the EMP_ID_SEQ sequence.
E) The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEES table.
F) The EMP_ID_SEQ sequence is invalidated when you modify the EMPLOYEE_ID column.

Solutions: