Online Access Free Oracle.1z1-071.v2021-12-09.q323 Practice Test (Page 62)

1z1-071 Exam Question 301

Examine this SQL statement:

Which two are true?

A.The subquery is executed for every row in the employees table.

B.The subquery is not a correlated subquery.

C.The DELETE statement executes successfully even if the subquery selects multiple rows.

D.All existing rows in the EMPLOYEES table are deleted.

E.The subquery is executed before the DELETE statement is executed.

1z1-071 Exam Question 302

Which two tasks can be performed by using Oracle SQL statements?

A.changing the password for an existing database user

B.connecting to a database instance

C.querying data from tables across databases

D.starting up a database instance

E.executing operating system (OS) commands in a session

1z1-071 Exam Question 303

View the exhibit and examine the ORDERS table.

The ORDERS table contains data and all orders have been assigned a customer ID. Which statement would add a NOT NULL constraint to the CUSTOMER_ID column?

A.ALTER TABLE ordersADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;

B.ALTER TABLE ordersMODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);

C.ALTER TABLE ordersMODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);

D.ALTER TABLE ordersADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);

1z1-071 Exam Question 304

Examine the structure of the ORDERS table: (Choose the best answer.)

You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,'rr'), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, 'yyyy');
Which statement is true regarding the result?

A.It executes successfully and gives the correct output.

B.It executes successfully but does not give the correct output.

C.It return an error because the datatype conversion in the SELECT list does not match the data type conversion in the GROUP BY clause.

D.It returns an error because the TO_CHAR function is not valid.

1z1-071 Exam Question 305

Which two are true about the data dictionary?

A.The data dictionary is constantly updated to reflect changes to database objects, permissions, and data.

B.All user actions are recorded in the data dictionary.

C.The SYS user owns all base tables and user-accessible views in the data dictionary.

D.Base tables in the data dictionary have the prefix DBA_.

E.All users have permissions to access all information in the data dictionary by default

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1z1-071 Exam Question 301

1z1-071 Exam Question 302

1z1-071 Exam Question 303

1z1-071 Exam Question 304

1z1-071 Exam Question 305

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