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Oracle 1z0-071 certification exam covers a range of topics, including SQL language fundamentals, database design, database administration, and data manipulation techniques. 1z1-071 exam tests a candidate's ability to write SQL queries, create and manage database objects, implement database security, and optimize SQL statements for performance. Additionally, the exam also covers the use of SQL Developer, a popular Oracle tool used for database development and management.
NEW QUESTION # 189
You execute this query:
SELECT TO CHAR (NEXT_DAY(LAST_DAY(SYSDATE),'MON' ),' dd"Monday for" fmMonth rrr') FROM DUAL;
What is the result?
- A. It returns the date for the last Monday of the current month.
- B. It generates an error.
- C. It returns the date for the first Monday of the next month.
- D. It executes successfully but does not return any result.
Answer: C
NEW QUESTION # 190
Which two statements are true about the SET VERIFY ON command?
- A. It displays values for variables used only in the WHERE clause of a query.
- B. It can be used only in SQL*plus.
- C. It displays values for variables prefixed with &&.
- D. It can be used in SQL Developer and SQL*Plus.
- E. It displays values for variables created by the DEFINE command.
Answer: B,C
NEW QUESTION # 191
View the exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.
The retrieve data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following SQL statement was written:
SELECT employee_id, first_name, department_name
FROM employees
NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?
- A. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.
- B. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
- C. The NATURAL JOIN clause is missing the USING clause.
- D. The table prefix is missing for the column names in the SELECT clause.
Answer: A
Explanation:
Natural join needs only one column to be the same in each table. The EMPLOYEES and DEPARTMENTS tables have two columns that are the same (Department_ID and Manager_ID)
NEW QUESTION # 192
Examine the structure of the CUSTOMERS table: (Choose two.)
CUSTNO is the PRIMARY KEY.
You must determine if any customers' details have been entered more than once using a different CUSTNO, by listing all duplicate names.
Which two methods can you use to get the required result?
- A. Left outer-join with self-join
- B. Self-join
- C. Subquery
- D. Full outer-join with self-join
- E. Right outer-join with self-join
Answer: B,C
NEW QUESTION # 193
What is true about non-equijoin statement performance?
- A. The BETWEEN condition always performs better than using the >= and <= conditions.
- B. The join syntax used makes no difference to performance.
- C. The BETWEEN condition always performs less well than using the >= and <= conditions.
- D. The Oracle join syntax performs better than the SQL:1999 compliant ANSI join syntax.
- E. Table aliases can improve performance.
Answer: B,E
NEW QUESTION # 194
View the exhibit and examine the structure of the EMPLOYEES table.
You want to select all employees having 100 as their MANAGER_ID manages and their manager.
You want the output in two columns: the first column should have the employee's manager's LAST_NAME and the second column should have the employee's LAST_NAME.
Which SQL statement would you execute?
- A. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eON m.employee_id = e.manager_idWHERE e.manager_id=100;
- B. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eON m.employee_id = e.manager_idWHERE m.manager_id=100;
- C. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eON e.employee_id = m.manager_idWHERE m.manager_id=100;
- D. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eWHERE m.employee_id = e.manager_id AND e.manager_id=100
Answer: A
NEW QUESTION # 195
You issued the following command:
SQL> DROP TABLE employees;
Which three statements are true?
- A. The employees table is moved to the recycle bin
- B. The employees table can be recovered using the rollback command.
- C. Sequences used in the employees table become invalid.
- D. All indexes and constraints defined on the table being dropped are also dropped.
- E. The space used by the employees table is reclaimed immediately.
- F. All uncommitted transactions are committed.
Answer: A,D,F
NEW QUESTION # 196
Examine the description products table:
Examine the description of the new_projects table;
Which two queries execute successfully?
- A.
- B.
- C.
- D.
- E.
Answer: D,E
NEW QUESTION # 197
Evaluate the following SQL statement:
SQL> select cust_id, cust_last_name "Last name"
FROM customers
WHERE country_id = 10
UNION
SELECT cust_id CUST_NO, cust_last_name
FROM customers
WHERE country_id = 30
Identify three ORDER BY clauses either one of which can complete the query.
- A. ORDER BY "CUST_NO"
- B. ORDER BY CUST_NO
- C. ORDER BY "Last name"
- D. ORDER BY 2, cust_id
- E. ORDER BY 2, 1
Answer: C,D,E
Explanation:
Explanation
Using the ORDER BY Clause in Set Operations
-The ORDER BY clause can appear only once at the end of the compound query.
-Component queries cannot have individual ORDER BY clauses.
-The ORDER BY clause recognizes only the columns of the first SELECT query.
-By default, the first column of the first SELECT query is used to sort the output in an ascending order.
NEW QUESTION # 198
Which two are true about queries using set operators (UNION, UNION ALL, INTERSECT and MINUS)?
- A. There must be an equal number of columns in each SELECT list.
- B. The FOR UPDATE clause cannot be specified.
- C. Each SELECT statement in the query can have an ORDER BY clause.
- D. None of the set operators can be used when selecting CLOB columns.
- E. The name of each column in the first SELECT list must match the name of the corresponding column in each subsequent SELECT list.
Answer: A,B
Explanation:
A). True. When using set operators, the number and order of columns must be the same in all SELECT statements involved in the query. The data types of those columns must also be compatible.
E). True. The FOR UPDATE clause cannot be specified in a subquery or a SELECT statement that is combined with another SELECT statement by using a set operator.
B is incorrect because the column names do not need to match; only the number and data types of the columns must be compatible. C is incorrect because only the final SELECT statement in the sequence of UNION/INTERSECT/MINUS operations can have an ORDER BY clause. D is incorrect because, as of Oracle 12c, UNION ALL can be used with CLOB columns, but UNION, INTERSECT, and MINUS cannot.
NEW QUESTION # 199
View the exhibit and examine the descriptions of the DEPTand LOCATIONStables.
You want to update the CITYcolumn of the DEPTtable for all the rows with the corresponding value in the CITYcolumn of the LOCATIONStable for each department.
Which SQL statement would you execute to accomplish the task?
UPDATE dept d
- A. SET city = ANY (SELECT city
FROM locations l)
UPDATE dept d - B. SET city = ALL (SELECT city
FROM locations l
WHERE d.location_id = l.location_id);
UPDATE dept d - C. SET city = (SELECT city
FROM locations l)
WHERE d.location_id = l.location_id;
UPDATE dept d - D. SET city = (SELECT city
FROM locations l
WHERE d.location_id = l.location_id);
Answer: D
NEW QUESTION # 200
You want to display the date for the first Monday of the next month and issue the following command:
What is the outcome?
- A. In generates an error because TO_CHAR should be replaced with TO_DATE.
- B. It executes successfully but does not return the correct result.
- C. In generates an error because fm and double quotation marks should not be used in the format string.
- D. In generates an error because rrrr should be replaced by rr in the format string.
- E. It executes successfully and returns the correct result.
Answer: E
NEW QUESTION # 201
Examine the command:
What does ON DELETE CASCADE imply?
- A. When a row in the BOOKS table is deleted, the rows in the BOOK_TRANSACTIONS table whose BOOK_ID matches that of the deleted row in the BOOKS table are also deleted.
- B. When the BOOKS table is dropped, the BOOK_TRANSACTIONS table is dropped.
- C. When a value in the BOOKS.BOOK_ID column is deleted, the corresponding value is updated in the BOOKS_TRANSACTIONS.BOOK_ID column.
- D. When the BOOKS table is dropped, all the rows in the BOOK_TRANSACTIONS table are deleted but the table structure is retained.
Answer: A
NEW QUESTION # 202
You are designing the structure of a table in which two columns have the specifications:
COMPONENT_ID- must be able to contain a maximum of 12 alphanumeric characters and uniquely identify the row EXECUTION_DATETIME- contains Century, Year, Month, Day, Hour, Minute, Second to the maximum precision and is used for calculations and comparisons between components.
Which two options define the data types that satisfy these requirements most efficiently?
- A. The COMPONENT_IDmust be of ROWID data type.
- B. The COMPONENT_IDcolumn must be of CHAR data type.
- C. The COMPONENT_IDmust be of VARCHAR2 data type.
- D. The EXECUTION_DATETIME must be of DATE data type.
- E. The EXECUTION_DATETIME must be of INTERVAL DAY TO SECOND data type.
- F. The EXECUTION_DATETIME must be of TIMESTAMP data type.
Answer: B,D
NEW QUESTION # 203
Examine the structure of the two tables.
Which two queries execute successfully? (Choose two.)
- A. Option B
- B. Option A
- C. Option C
- D. Option D
- E. Option E
Answer: C,D
NEW QUESTION # 204
Examine the structure of the BOOKS_TRANSACTIONS table:
You want to display the member IDs, due date, and late fee as $2 for all transactions.
Which SQL statement must you execute?
- A. SELECT member_id 'MEMBER ID', due_date 'DUE DATE', '$2 AS LATE FEE' FROM BOOKS_TRANSACTIONS;
- B. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", '$2' AS "LATE FEE" FROM BOOKS_TRANSACTIONS;
- C. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", $2 AS "LATE FEE" FROM BOOKS_TRANSACTIONS;
- D. SELECT member_id AS MEMBER_ID, due_date AS DUE_DATE, $2 AS LATE_FEE
FROM BOOKS_TRANSACTIONS;
Answer: B
NEW QUESTION # 205
Which two statements are true about the DUAL table?
- A. It can be used to display only constants or pseudo columns.
- B. It consists of a single row and single column of VARCHAR2 data type.
- C. It can display multiple rows but only a single column.
- D. It can display multiple rows and columns.
- E. It can be accessed only by the SYS user.
- F. It can be accessed by any user who has the SELECT privilege in any schema.
Answer: B,F
NEW QUESTION # 206
Examine the description of the EMPLOYEES table:
Examine this query:
Which line produces an error?
- A. Line 5
- B. Line 8
- C. Line 3
- D. Line 7
Answer: C
NEW QUESTION # 207
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Oracle 1z0-071 (Oracle Database SQL) Certification Exam is an industry-recognized certification that validates the skills of SQL developers, database administrators, and database designers. 1z1-071 exam is designed to test the candidate's knowledge of SQL language, database concepts, and data modeling. The Oracle 1z0-071 certification is considered one of the most prestigious certifications in the IT industry, and it is highly recognized by leading IT organizations worldwide.
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