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The Oracle 1z0-071 exam is a multiple-choice test that consists of 73 questions. The exam is divided into six sections, each of which covers a different aspect of SQL, including SQL fundamentals, data retrieval using SELECT statements, single-row functions, and data manipulation using DML statements.

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Oracle Database SQL Sample Questions (Q167-Q172):

NEW QUESTION # 167
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. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
  • D. There would be no change in performance.

Answer: D

NEW QUESTION # 168
SCOTT is a user in the database.
Evaluate the commands issued by the DBA:

Which statement is true regarding the execution of the above commands?

  • A. Statement 3 would not execute because role and system privileges cannot be granted together in a single GRANT statement.
  • B. Statement 1 would not execute because the IDENTIFIED BY <password> clause is missing.
  • C. Statement 2 would not execute because system privileges and object privileges cannot be granted together in a single GRANT command.
  • D. Statement 1 would not execute because the WITH GRANT option is missing.

Answer: C

NEW QUESTION # 169
Examine the data in the CUST_NAME column of the CUSTOMERS table.

You want to extract only those customer names that have three names and display the * symbol in place of the first name as follows:

Which two queries give the required output?

  • A. SELECT LPAD(SUBSTR(cust_name, INSTR (cust_name ‘ ‘)),LENGTH(cust_name) – INSTR(cust_name, ‘ ‘), ‘*’) “CUST NAME”FROM customersWHERE INSTR(cust_name, ‘ ‘,1,-2)<>0;
  • B. SELECT LPAD(SUBSTR(cust_name, INSTR(cust_name, ‘ ‘)),LENGTH(cust_name),’*’) “CUST NAME”FROM customersWHERE INSTR(cust_name, ‘ ‘,-1,2)<>0;
  • C. SELECT LPAD(SUBSTR(cust_name, INSTR(cust_name, ‘ ‘)),LENGTH(cust_name),’*’) “CUST NAME”FROM customersWHERE INSTR(cust_name, ‘ ‘,1,2)<>0;
  • D. SELECT LPAD(SUBSTR(cust_name, INSTR (cust_name ‘ ‘)),LENGTH(cust_name) – INSTR(cust_name, ‘ ‘), ‘*’) “CUST NAME”FROM customersWHERE INSTR(cust_name, ‘ ‘,1,2)<>0;

Answer: B,C

NEW QUESTION # 170
Which two statements are true regarding constraints? (Choose two.)

  • A. A foreign key cannot contain NULL values.
  • B. You can have more than one column in a table as part of a primary key.
  • C. A column with the UNIQUE constraint can store NULLS.
  • D. A constraint is enforced only for an INSERT operation on a table.

Answer: B,C

NEW QUESTION # 171
Which two statements will do an implicit conversion?

  • A. SELECT * FROM customers WHERE customer_ id = 0001 ;
  • B. SELECT * FROM customers WHERE TO_ CHAR (customer_ id) =’0001′;
  • C. SELECT * FROM customers WHERE insert date =’01-JAN-19′
  • D. SELECT * FROM customers WHERE customer id = ‘0001’;
  • E. SELECT * FROM customers WHERE insert_ date = DATE ‘2019-01-01’;

Answer: C,D

NEW QUESTION # 172
……

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