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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Which four are types of functions available in SQL? (Choose 4)

A) integer
B) date
C) numeric
D) string
E) conversion
F) translation
G) calendar
H) character

2. The EMPLOYEES table has these columns:
LAST NAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE
Management wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement:
ALTER TABLE EMPLOYEES MODIFY (SALARY DEFAULT 5000);
What is true about your ALTER statement?

A) Column definitions cannot be altered to add DEFAULT values.
B) A change to the DEFAULT value affects only subsequent insertions to the table.
C) All the rows that have a NULL value for the SALARY column will be updated with the value 5000.
D) Column definitions cannot be altered at add DEFAULT values for columns with a NUMBER data type.

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

4. Which three statements correctly describe the functions and use of constraints? (Choose three.)

A) Constraints enforce rules at the view level.
B) Constraints prevent the deletion of a table if there are dependencies.
C) Constraints make complex queries easy.
D) Constraints prevent the deletion of an index if there are dependencies.
E) Constraints enforce rules at the table level.
F) Constraints provide data independence.

5. Which four are valid Oracle constraint types? (Choose four.)

A) NOT NULL
B) CHECK
C) CASCADE
D) CONSTANT
E) UNIQUE
F) NONUNIQUE
G) PRIMARY KEY

Solutions: