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Oracle Database SQL Sample Questions (Q116-Q121):

NEW QUESTION # 116
View the exhibit and examine the ORDERStable.

The ORDERStable contains data and all orders have been assigned a customer ID. Which statement would add a NOTNULLconstraint to the CUSTOMER_IDcolumn?
ALTER TABLE orders

A. ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
ALTER TABLE orders
B. MODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);
ALTER TABLE orders
C. MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
ALTER TABLE orders
D. ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;

Answer: B

NEW QUESTION # 117
View the exhibit and examine the structure of the SALES, CUSTOMERS, PRODUCTSand TIMEStables.

The PROD_IDcolumn is the foreign key in the SALEStable referencing the PRODUCTStable.
The CUST_IDand TIME_IDcolumns are also foreign keys in the SALEStable referencing the CUSTOMERS and TIMEStables, respectively.
Examine this command:
CREATE TABLE new_sales (prod_id, cust_id, order_date DEFAULT SYSDATE)
AS
SELECT prod_id, cust_id, time_id
FROM sales;
Which statement is true?

A. The NEW_SALEStable would get created and all the FOREIGNKEYconstraints defined on the selected columns from the SALES table would be created on the corresponding columns in the NEW_SALES table.
B. The NEW_SALEStable would not get created because the column names in the CREATETABLE command and the SELECTclause do not match.
C. The NEW_SALEStable would not get created because the DEFAULTvalue cannot be specified in the column definition.
D. The NEW_SALEStable would get created and all the NOTNULLconstraints defined on the selected columns from the SALES table would be created on the corresponding columns in the NEW_SALES table.

Answer: D

NEW QUESTION # 118
Evaluate the following CREATE TABLE command:

Which statement is true regarding the above SQL statement?

A. It would execute successfully and only ORD_ITM_IDX index would be created.
B. It would give an error because the USING INDEX is not permitted in the CRETAE TABLE command.
C. It would give an error because the USING INDEX clause cannot be used on a composite primary.
D. It would execute successfully and two indexes ORD_ITM_IDX and ORD_ITM_ID PK would be created.

Answer: A

NEW QUESTION # 119
Which two statements are true about Entity Relationships?

A. A table name can be specified just once when selecting data from a table having a selfreferencing relationship
B. A one-to-many relatonship in one direction is a one-to-one relationship in the other direction
C. A Relationship can be mandatory for both entities
D. A one-to-one relationship is always a self-referencing relationship
E. A many-to-many relationship can be implemented only by using foreign keys

Answer: C,E

NEW QUESTION # 120
Evaluate the following two queries:

Which statement is true regarding the above two queries?

A. Performance would improve in query 2.
B. Performance would degrade in query 2.
C. There would be no change in performance.
D. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.

Answer: C

NEW QUESTION # 121
......

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