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Question ID 7973

Which is an iSQL*Plus command?

Option A

INSERT

Option B

UPDATE

Option C

SELECT

Option D

DESCRIBE

Option E

DELETE

Option F

RENAME

Correct Answer D
Explanation Explanation/Reference: Explanation : The only SQL*Plus command in this list : DESCRIBE. It cannot be used as SQL command. This command returns a description of tablename, including all columns in that table, the datatype for each column and an indication of whether the column permits storage of NULL values. Incorrect answer: A INSERT is not a SQL*PLUS command B UPDATE is not a SQL*PLUS command C SELECT is not a SQL*PLUS command E DELETE is not a SQL*PLUS command F RENAME is not a SQL*PLUS command Refer : Introduction to Oracle9i : SQL, Oracle University Study Guide, 7


Question ID 7974

Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) Which statement produces the number of different departments that have employees with last name Smith?

Option A

SELECT COUNT (*) FROM employees WHERE last _name='smith';

Option B

SELECT COUNT (dept_id) FROM employees WHERE last _name='smith';

Option C

SELECT DISTINCT (COUNT (dept_id) FROM employees WHERE last _name='smith';

Option D

SELECT COUNT (DISTINCT dept_id) FROM employees WHERE last _name='smith';

Option E

SELECT UNIQE (dept_id) FROM employees WHERE last _name='smith';

Correct Answer D
Explanation

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