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Question ID 1684

In which case would you use a FULL OUTER JOIN?

Option A

A.    Both tables have NULL values.
 

Option B

B.    You want all unmatched data from one table.
 

Option C

C.    You want all matched and unmatched data from only one table.

 

Option D

D.    You want all unmatched data from both tables.
 

Option E

E.    You want all matched data from both tables.

Correct Answer D
Explanation


Question ID 1685

Examine the SQL statement that creates ORDERS table:
CREATE TABLE orders
(SER_NO NUMBER UNIQUE,
ORDER_ID NUMBER,
ORDER_DATE DATE NOT NULL,
STATUS VARCHAR2(10)
 
CHECK (status IN ('CREDIT', 'CASH')), PROD_ID NUMBER
REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER,
PRIMARY KEY (order_id, order_date));
For which columns would an index be automatically created when you execute the above SQL statement? (Choose two.)
 

Option A

A.    ORDER_ID
 

Option B

B.    SER_NO
 

Option C

C.    PROD_ID
 

Option D

D.    ORD_TOTAL

 

Option E

E.    composite index on ORDER_ID and ORDER_DATE

Correct Answer B,E
Explanation

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