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Oracle 1z0-071 exam covers a wide range of topics, including SQL basics, data retrieval using SQL, data manipulation using SQL, and database objects. 1z0-071 exam also tests the candidates' knowledge of SQL functions, subqueries, and joins. Oracle 1z0-071 is a comprehensive exam that covers all aspects of SQL programming, making it an ideal certification for individuals who want to become SQL experts.
NEW QUESTION # 149
You execute these commands successfully:
CREATE GLOBAL TEMPORARY TABLE invoices _ gtt
( customer id INTEGER,
invoice_ total NUMBER (10, 2)
) ON COMMIT PRESERVE ROWS;
INSERT INTO invoices_ gtt VALUES (1, 100);
COMMIT;
Which two are true?
- A. When you terminate your session, the row will be deleted.
- B. You can add a column to the table in this session.
- C. Other sessions can view the committed row.
- D. To drop the table in this session, you must first truncate it.
- E. You can add a foreign key to the table.
Answer: A,D
NEW QUESTION # 150
View the Exhibit and examine the details of the PRODUCT_INFORMATION table. (Choose two.)
Evaluate this SQL statement:
SELECT TO_CHAR (list_price, '$9,999')
From product_information;
Which two statements are true regarding the output?
- A. A row whose LIST_PRICE column contains value 1123.90 would be displayed as
$ 1,123. - B. A row whose LIST_PRICE column contains value 11235.90 would be displayed as
# ######. - C. A row whose LIST_PRICE column contains value 11235.90 would be displayed as
$ 1,123. - D. A row whose LIST_PRICE column contains value 1123.90 would be displayed as
$ 1,124.
Answer: B,D
NEW QUESTION # 151
View the Exhibit and examine the structure of the SALESand PRODUCTStables. (Choose two.)
In the SALEStable, PROD_ID is the foreign key referencing PROD_ID in the PRODUCTS table. You must list each product ID and the number of times it has been sold.
Examine this query which is missing a JOINoperator:
Which two JOINoperations can be used to obtain the required output? (Choose two.) FULL OUTER JOIN
- A. JOIN
- B.
- C. RIGHT OUTER JOIN
- D. LEFT OUTER JOIN
Answer: A,C
NEW QUESTION # 152
Which two statements are true about Data Manipulation Language (DML) statements? (Choose two.)
- A. A DELETE FROM..... statement can remove multiple rows based on multiple conditions on a table.
- B. An INSERT INTO...VALUES.. statement can add multiple rows per execution to a table.
- C. An UPDATE... SET... statement can modify multiple rows based on multiple conditions on a table.
- D. An INSERT INTO... VALUES..... statement can add a single row based on multiple conditions on a table.
- E. An UPDATE....SET.... statement can modify multiple rows based on only a single condition on a table.
- F. A DELETE FROM..... statement can remove rows based on only a single condition on a table.
Answer: A,C
Explanation:
http://www.techonthenet.com/sql/and_or.php
NEW QUESTION # 153
Examine the data in the EMP table:
You execute this query:
SELECT deptno AS "Department", AVG(sal) AS AverageSalary, MAX(sal) AS "Max Salary" FROM emp WHERE sal >= 12000 GROUP BY "Department " ORDER BY AverageSalary; Why does an error occur?
- A. An alias name must always be specified in quotes.
- B. An alias name must not be used in a GROUP BY clause.
- C. An allas name must not contain space characters.
- D. An alias name must not be used in an ORDER BY clause.
Answer: B
NEW QUESTION # 154
Which three statements are true about dropping and unused columns in an Oracle database?
- A. Partition key columns cannot be dropped.
- B. An UNUSED column's space is remained automatically when the row containing that column is next queried.
- C. A DROP COLUMN command can be rolled back.
- D. A column that is set to NNUSED still counts towards the limit of 1000 columns per table.
- E. An UNUSED column's space is remained automatically when the block containing that column is next queried.
- F. A primary key column referenced by another column as a foreign key can be dropped if using the CASCADE option.
Answer: A,D,F
NEW QUESTION # 155
Examine the structure of the EMPLOYEES table. (Choose two.)
You must display the maximum and minimum salaries of employees hired 1 year ago.
Which two statements would provide the correct output?
- A. SELECT MIN(Salary), MAX(salary)FROM (SELECT salary FROM employeesWHERE hire_date < SYSDATE-365);
- B. SELECT MIN(Salary) minsal, MAX(salary) maxsalFROM employeesWHERE hire_date < SYSDATE-365GROUP BY MIN(salary), MAX(salary);
- C. SELECT minsal, maxsalFROM (SELECT MIN(salary) minsal, MAX(salary) maxsal FROM employeesWHERE hire_date < SYSDATE-365GROUP BY MIN(salary), MAX(salary);
- D. SELECT minsal, maxsalFROM (SELECT MIN(salary) minsal, MAX(salary) maxsal FROM employeesWHERE hire_date < SYSDATE-365)GROUP BY maxsal, minsal;
Answer: A,D
NEW QUESTION # 156
Examine this partial statement:
SELECT ename, sal,comm FROM emp
Now examine this output:
WHICH ORDER BY clause will generate the displayed output?
- A. ORDER BY comm DESC NULLS LAST, ename
- B. ORDER BY NVL(comm,0) ASC NULLS FIRST, ename
- C. ORDER BY NVL(comm,0) ASC NULLS LAST, ename
- D. ORDER BY NVL(enam,0) DESC, ename
Answer: A,D
NEW QUESTION # 157
Which statement adds a column called SALARYto the EMPLOYEEStable having 100 rows, which cannot contain null?
- A. ALTER TABLE EMPLOYEES
ADD SALARY NUMBER(8,2) NOT NULL; - B. ALTER TABLE EMPLOYEES
ADD SALARY NUMBER(8,2) DEFAULT 0 NOT NULL; - C. ALTER TABLE EMPLOYEES
ADD SALARY NUMBER(8,2) DEFAULT CONSTRAINT p_nn NOT NULL; - D. ALTER TABLE EMPLOYEES
ADD SALARY NUMBER(8,2) DEFAULT NOT NULL;
Answer: B
NEW QUESTION # 158
View the Exhibit and examine the data in the EMPLOYEES table.
Exhibit
You want to generate a report showing the total compensation paid to each employee to date.
You issue the following query:
What is the outcome?
- A. It generates an error because the concatenation operator can be used to combine only two items.
- B. It generates an error because the usage of the ROUND function in the expression is not valid.
- C. It generates an error because the alias is not valid.
- D. IT executes successfully and gives the correct output.
- E. It executes successfully but does not give the correct output.
Answer: E
NEW QUESTION # 159
Which two are SQL features?
- A. providing update capabilities for data in external files
- B. providing database transaction control
- C. processing sets of data
- D. providing variable definition capabilities.
- E. providing graphical capabilities
Answer: B,C
NEW QUESTION # 160
Examine the data in the ENPLOYEES table:
Which statement will compute the total annual compensation tor each employee
- A. SELCECT last_namo, (monthly_salary * 12) + (menthy_salary * 12 * monthly_commission_pct) AS annual_comp FROM employees
- B. SELCECT last_namo, (monthly_salary * 12) + (monthly_commission_pct * 12) AS annual_comp FROM employees
- C. SELCECT last_namo, (monthly_salary * 12) + (menthy_salary * 12 * NVL (monthly_commission_pct, 0)) AS annual_comp FROM employees
- D. SECECT last_namo, (menthy_salary + monthly_commission_pct) * 12 AS annual_comp FROM employees;
Answer: C
NEW QUESTION # 161
Evaluate the following query:
What would be the outcome of the above query?
- A. It produces an error because the data types are not matching.
- B. It executes successfully and introduces an 'sat the end of each promo_namein the output.
- C. It executes successfully and displays the literal " {'s start date was \> "for each row in the output.
- D. It produces an error because flower braces have been used.
Answer: B
NEW QUESTION # 162
See the Exhibit and examine the structure of the PROMOTIONS table:
Using the PROMOTIONS table,
you need to find out the average cost for all promos in the range $0-2000 and $2000-5000 in category A.
You issue the following SQL statements:
What would be the outcome?
- A. It executes successfully and gives the required result.
- B. It generates an error because NULL cannot be specified as a return value.
- C. It generates an error because CASE cannot be used with group functions.
- D. It generates an error because multiple conditions cannot be specified for the WHEN clause.
Answer: A
Explanation:
CASE Expression
Facilitates conditional inquiries by doing the work of an IF-THEN-ELSE statement:
CASE expr WHEN comparison_expr1 THEN return_expr1
[WHEN comparison_expr2 THEN return_expr2
WHEN comparison_exprn THEN return_exprn
ELSE else_expr]
END
NEW QUESTION # 163
Which three statements are true about GLOBAL TEMPORARY TABLES?
- A. A DELETE command on a GLOBAL TEMPORARY TABLE cannot be rolled back.
- B. GLOBAL TEMPORARY TABLE space allocation occurs at session start.
- C. A GLOBAL TEMPORARY TABLE's definition is available to multiple sessions.
- D. A TRUNCATE command issued in a session causes all rows In a GLOBAL TEMPORARY TABLE for the issuing session to be deleted.
- E. Any GLOBAL TEMPORARY TABLE rows existing at session termination will be deleted.
- F. GLOBAL TEMPORARY TABLE rows inserted by a session are available to any other session whose user has been granted select on the table.
Answer: C,D,E
Explanation:
Global temporary tables in Oracle Database 12c have unique characteristics, primarily around their visibility and lifespan which is session-specific:
B . A TRUNCATE command issued in a session causes all rows in a GLOBAL TEMPORARY TABLE for the issuing session to be deleted: This is accurate as TRUNCATE in the context of a global temporary table only affects the rows inserted during the session that issues the command. The effect is isolated to the session.
D . A GLOBAL TEMPORARY TABLE's definition is available to multiple sessions: The definition (i.e., the structure of the table such as column names, data types, etc.) of a global temporary table is persistent and visible across sessions. However, the data within is session-specific.
E . Any GLOBAL TEMPORARY TABLE rows existing at session termination will be deleted: True, as the data in a global temporary table is designed to be temporary for the duration of a session. When the session ends, the data is automatically deleted.
Reference:
Oracle Database Concepts and SQL Language Reference 12c, especially sections on temporary tables.
NEW QUESTION # 164
Choose the best answer.
Examine the description of the EMPLOYEES table:
Which query is valid?
- A. SELECT depe_id,join_date,SUM(salary) FROM employees GROUP BY dept_id:
- B. SELECT dept_id,MAX(AVG(salary)) FROM employees GROUP BY dept_id;
- C. SELECT dept_id,AVG(MAX(salary)) FROM employees GROUP BY dapt_id;
- D. SELECT dept_id, join_date,SUM(salary) FROM employees GROUP BY dept_id, join_date;
Answer: D
Explanation:
In Oracle 12c SQL, the GROUP BY clause is used to arrange identical data into groups with the GROUP BY expression followed by the SELECT statement. The SUM() function is then used to calculate the sum for each grouped record on a specific column, which in this case is the salary column.
Option A is valid because it correctly applies the GROUP BY clause. Both dept_id and join_date are included in the SELECT statement, which is a requirement when using these columns in conjunction with the GROUP BY clause. This means that the query will calculate the sum of salaries for each combination of dept_id and join_date. It adheres to the SQL rule that every item in the SELECT list must be either an aggregate function or appear in the GROUP BY clause.
Option B is invalid due to a typo in SELECT depe_id and also because it ends with a colon rather than a semicolon.
Option C is invalid because you cannot nest aggregate functions like MAX(AVG(salary)) without a subquery.
Option D is invalid for the same reason as option C, where it tries to nest aggregate functions AVG(MAX(salary)), which is not allowed directly in SQL without a subquery.
For further reference, you can consult the Oracle 12c documentation, which provides comprehensive guidelines on how to use the GROUP BY clause and aggregate functions like SUM():
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): GROUP BY Clause
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): Aggregate Functions
NEW QUESTION # 165
Which two are true about transactions in the Oracle Database?
- A. A DDL statement issued by a session with an uncommitted transation automaticall commits that transaction.
- B. An uncommitted transaction is automatically committed when the user exits SQL*PLUS
- C. DDL statements automatically commit only data dictionary updates caused by executing the DDL.
- D. DML statements always start new transactions.
- E. A session can see uncommitted updates made by the same user in a different session
Answer: A,D
Explanation:
B). True. DDL (Data Definition Language) statements in Oracle Database are auto-commit statements. This means that if a DDL statement is issued, any uncommitted transactions in the same session will automatically be committed.
D). False. This is a common misconception. DML (Data Manipulation Language) statements do not automatically start new transactions. In Oracle, a transaction begins when the first DML statement (INSERT, UPDATE, DELETE, MERGE, SELECT FOR UPDATE) is encountered after a previous transaction has been committed or rolled back.
A is incorrect because DDL statements automatically commit the entire transaction, not just the data dictionary updates. C is incorrect because an uncommitted transaction is not automatically committed when a user exits SQL*Plus; instead, it is rolled back. E is incorrect because a session cannot see uncommitted updates made by other sessions.
NEW QUESTION # 166
In the EMPLOYEEStable there are 1000 rows and employees are working in the company for more than 10 years.
Evaluate the following SQL statement:
What would be the result?
- A. It executes successfully but no rows updated.
- B. It gives an error because NVLfunction cannot be used with UPDATE.
- C. It executes successfully and updates the records of those employees who have been working in the company for more than 600 days.
- D. It gives an error because multiple NVLfunctions are used in an expression.
Answer: C
NEW QUESTION # 167
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