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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Examine the structure of the EMPLOYEES table:

Which INSERT statement is valid?

A) INSERT INTO employees (employee_id, first_name, last_name, hire_date) VALUES ( 1000, 'John', 'Smith', '01/01/01');
B) INSERT INTO employees(employee_id, first_name, last_name, Hire_date) VALUES ( 1000, 'John', 'Smith', To_date('01/01/01'));
C) INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES ( 1000, 'John', 'Smith', 01-Jan-01);
D) INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES ( 1000, 'John', 'Smith', '01 January 01');

2. The DBA issues this SQL command:
CREATE USER scott IDENTIFIED by tiger;
What privileges does the user Scott have at this point?

A) only the SELECT privilege
B) all the privileges of a default user
C) no privileges
D) only the CONNECT privilege

3. In which case would you use a FULL OUTER JOIN?

A) One of the tables has more data than the other.
B) Both tables have NULL values.
C) You want all unmatched data from both tables.
D) You want all unmatched data from one table.
E) You want all matched and unmatched data from only one table.
F) You want all matched data from both tables.

4. The CUSTOMERS table has these columns:
CUSTOMER_ID NUMBER(4) NOT NULL
CUSTOMER_NAME VARCHAR2(100) NOT NULL
CUSTOMER_ADDRESS VARCHAR2(150)
CUSTOMER_PHONE VARCHAR2(20)
You need to produce output that states "Dear Customer customer_name, ".
The customer_name data values come from the CUSTOMER_NAME column in the CUSTOMERS table.
Which statement produces this output?

A) SELECT 'Dear Customer ' || customer_name ',' FROM customers;
B) SELECT "Dear Customer", customer_name || ',' FROM customers;
C) SELECT 'Dear Customer ' || customer_name || ',' || FROM customers;
D) SELECT "Dear Customer " || customer_name || "," FROM customers;
E) SELECT 'Dear Customer ' || customer_name || ',' FROM customers;
F) SELECT dear customer, customer_name, FROM customers;

5. The CUSTOMERS table has these columns:

The CUSTOMER_ID column is the primary key for the table.
You need to determine how dispersed your customer base is.
Which expression finds the number of different countries represented in the CUSTOMERS table?

A) COUNT(UNIQUE(UPPER(country_address)))
B) COUNT(DISTINCT (UPPER(country_address)))
C) COUNT DISTINCT UPPER(country_address)
D) COUNT(UPPER(country_address))
E) COUNT(DIFF(UPPER(country_address)))

Solutions: