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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Examine the structure of the EMPLOYEES table:

You want to create a SQL script file that contains an INSERT statement. When the script is run, the INSERT statement should insert a row with the specified values into the EMPLOYEES table. The INSERT statement should pass values to the table columns as specified below: Which INSERT statement meets the above requirements?

A) INSERT INTO (SELECT *
FROM employees
WHERE (department_id = 20 AND
department_id = 50)
WITH CHECK OPTION )
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);
B) INSERT INTO employees
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid',
2000, NULL, &did IN (20,50));
C) INSERT INTO (SELECT *
FROM employees
WHERE department_id IN (20,50)
WITH CHECK OPTION)
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);
D) INSERT INTO employees
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);
E) INSERT INTO (SELECT *
FROM employees
WHERE department_id IN (20,50))
VALUES (emp_id_seq.NEXTVAL, '&ename', '&jobid', 2000, NULL, &did);

2. Evaluate the SQL statement
DROP TABLE DEPT:
Which four statements are true of the SQL statement? (Choose four)

A) All data in the table is deleted, but the structure of the table is retained.
B) All indexes based on the DEPT table are dropped.
C) All data in the table is deleted, and the table structure is also deleted.
D) All pending transactions are committed.
E) All synonyms based on the DEPT table are deleted.
F) All views based on the DEPT table are deleted.
G) You cannot roll back this statement.

3. A subquery can be used to _________.

A) Retrieve data based on an unknown condition
B) Sort data in a specific order
C) Create groups of data
D) Convert data to a different format

4. What does the TRUNCATE statement do?

A) Shortens the table to 10 rows
B) Removes all columns from a table
C) Removes all rows from a table
D) Removes the table
E) Removes foreign keys from a table

5. Examine the description of the EMPLOYEES table:

Which statement shows the maximum salary paid in each job category of each department?

A) SELECT dept_id, job_cat, MAX(salary)
FROM employees
GROUP BY dept_id, job_cat;
B) SELECT dept_id, job_cat, MAX(salary)
FROM employees
GROUP BY dept_id, job_cat, salary;
C) SELECT dept_id, job_cat, MAX(salary)
FROM employees
WHERE salary > MAX(salary);
D) SELECT dept_id, job_cat, MAX(salary)
FROM employees;
E) SELECT dept_id, job_cat, MAX(salary)
FROM employees
GROUP BY dept_id;

Solutions: