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NEW QUESTION # 43
View the Exhibit and examine the details of the ORDER_ITEMS table.
Evaluate the following SQL statements:
Statement 1:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items;
Statement 2:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items
GROUP BY order_id;
Which statements are true regarding the output of these SQL statements? (Choose all that apply.)
- A. Both statements would ignore NULL values for the UNIT_PRICE and QUANTITY columns.
- B. Both the statements would give the same output.
- C. Statement 1 would return only one row of output.
- D. Statement 2 would return multiple rows of output.
- E. Statement 1 would not return give the same output.
Answer: A,C,D
NEW QUESTION # 44
Examine the description of the ENPLYEES table:
Which two queries return all rows for employees whose salary is greater than the average salary in their department?
- A. SELECT.
FROM
SELECT e.", AVG (salary) OVER (PARTITION BY department id) avg_ sal
FROM employees e
WHERE salary > avg_ sal; - B. SELECT
FROM employees
WHERE salary > AVG (salary) OVER (PARTITION BY department _ id); - C. SELECT "
FROM employees
WHERE salary > ANY
SELECT AVG (salary)
EROM employees
GROUP BY department_ id); - D. SELECT"
FROM employees
WHERE salary >
( SELECT AVG
(salary) FROM
employees
GROUP BY department _ id - E. SELECT"
FROM employees e1
WHERE salary >!
SELECT AVG (salary)
FROM employees e2
WHERE e1. Department _id = e2, department_ id
Answer: A,E
NEW QUESTION # 45
In which three situations does a new transaction always start?
- A. When issuing a DML statement after a DML statement filed in the same session.
- B. When issuing a TRUNCATE statement after a SELECT statement was issued in the same session
- C. When issuing a SELECT FOR UPDATE statement after a CREATE TABLE AS SELECT statement was issued in the same session
- D. When issuing a CREATE INDEX statement after a CREATE TABLE statement completed unsuccessfully in the same session
- E. When issuing the first Data Manipulation Language (OML) statement after a COMMIT or ROLLBACK statement was issued in the same session
- F. When issuing a CREATE TABLE statement after a SELECT statement was issued in the same session
Answer: B,C,E
Explanation:
Substitution variables in Oracle are used to replace a value dynamically during the execution of SQL statements. The behavior of these variables is well-documented:
* C. A substitution variable prefixed with & always prompts only once for a value in a session: This is true. In a session, when you use a single ampersand (&), SQL*Plus or SQL Developer will prompt for the value the first time the variable is encountered. The value for this variable will then be reused for the remainder of the session unless it is redefined.
* D. A substitution variable can be used with any clause in a SELECT statement: Substitution
* variables can be placed in any part of a SQL statement, including the SELECT, WHERE, GROUP BY, ORDER BY, etc. They are not limited to any specific clause.
References:
* Oracle SQL*Plus User's Guide and Reference, which discusses substitution variables.
NEW QUESTION # 46
View the Exhibit and examine the structure of the CUSTOMERS table.
Using the CUSTOMERS table, you must generate a report that displays a credit limit increase of 15% for all customers.
Customers with no credit limit should have "Not Available" displayed.
Which SQL statement would produce the required result?
- A. SELECT NVL(TO_CHAR(cust_credit_limit*.15),'Not Available') "NEW CREDIT"FROM customers;
- B. SELECT NVL(cust_credit_limit,'Not Available')*.15 "NEW CREDIT"FROM customers;
- C. SELECT TO_CHAR(NVL(cust_credit_limit*.15,'Not Available')) "NEW CREDIT"FROM customers;
- D. SELECT NVL(cust_credit_limit*.15,'Not Available') "NEW CREDIT"FROM customers;
Answer: A
NEW QUESTION # 47
Which two are true about creating tables in an Oracle database?
- A. The same table name can be used for tables in different schemas.
- B. Creating an external table will automatically create a file using the specified directory and file name.
- C. A primary key constraint is manadatory.
- D. A create table statement can specify the maximum number of rows the table will contain.
- E. A system privilege is required.
Answer: A,D
NEW QUESTION # 48
Which three statements are true about dropping and unused columns in an Oracle database?
- A. A DROP COLUMN command can be rolled back.
- B. An UNUSED column's space is remained automatically when the row containing that column is next queried.
- C. A primary key column referenced by another column as a foreign key can be dropped if using the CASCADE option.
- D. Partition key columns cannot be dropped.
- E. An UNUSED column's space is remained automatically when the block containing that column is next queried.
- F. A column that is set to NNUSED still counts towards the limit of 1000 columns per table.
Answer: A,D,F
Explanation:
* A. A primary key column referenced by another column as a foreign key can be dropped if using the CASCADE option. (Incorrect) Primary key columns that are referenced by foreign keys cannot be dropped as it would violate referential integrity. The CASCADE option does not apply in this context.
* B. A DROP COLUMN command can be rolled back. (Correct)
Dropping a column from a table is a transactional operation. If it's not committed, it can be rolled back.
NEW QUESTION # 49
Which two statements are true about conditional INSERT ALL? (Choose two.)
- A. Each row returned by the subquery can be inserted into only a single target table.
- B. It cannot have an ELSEclause.
- C. The total number of rows inserted is always equal to the number of rows returned by the subquery.
- D. A single WHEN condition can be used for multiple INTOclauses.
- E. Each WHENcondition is tested for each row returned by the subquery.
Answer: D,E
NEW QUESTION # 50
View the Exhibit and examine the structure of the ORDER_ITEMS table.
You must select the ORDER_ID of the order that has the highest total value among all the orders in the ORDER_ITEMS table.
Which query would produce the desired result?
- A. SELECT order_idFROM order_itemsGROUP BY order_idHAVING SUM(unit_price*quantity) = (SELECT MAX(SUM(unit_price*quantity))FROM order_items GROUP BY order_id);
- B. SELECT order_idFROM order_itemsWHERE(unit_price*quantity) = (SELECT
MAX(unit_price*quantity)FROM order_items)GROUP BY order_id; - C. SELECT order_idFROM order_itemsWHERE (unit_price*quantity) = (SELECT MAX(unit_price*quantity)FROM order_itemsGROUP BY order_id)
- D. SELECT order_idFROM order_itemsWHERE(unit_price*quantity) =
MAX(unit_price*quantity)GROUP BY order_id;
Answer: A
NEW QUESTION # 51
For each employee in department 90 you want to display:
1. their last name
2. the number of complete weeks they have been employed
The output must be sorted by the number of weeks, starting with the longest serving employee
first.Which statement will accomplish this?
- A. SELECT last_name, TRUNC( (SYSDATE - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure ; - B. SELECT last_name, ROUND( (SYSDATE - hire_ date) 17) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure DESC; - C. SELECT last_name, TRUNC ( (SYSDATE - - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_id = 90
ORDER BY tenure DESC; - D. SELECT last_name, ROUND( (SYSDATE - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure ;
Answer: C
NEW QUESTION # 52
View the Exhibit and examine the structure of the EMPLOYEES and JOB_HISTORY tables.
Examine this query which must select the employee IDs of all the employees who have held the job SA_MAN at any time during their employment.
SELECT EMPLOYEE_ID
FROM EMPLOYEES
WHERE JOB_ID = 'SA_MAN'
-------------------------------------
SELECT EMPLOYEE_ID
FROM JOB_HISTORY
WHERE JOB_ID = 'SA_MAN';
Choose two correct SET operators which would cause the query to return the desired result.
- A. INTERSECT
- B. MINUS
- C. UNION ALL
- D. UNION
Answer: C,D
Explanation:
Explanation/Reference:
NEW QUESTION # 53
Examine this SQL statement:
Which two are true?
- A. The subquery is executed for every row in the EMPLOYEES table.
- B. All existing rows in the EMPLOYEES table are deleted.
- C. The subquery is executed before the DELETE statement is executed.
- D. The subquery is not a correlated subquery.
- E. The DELETE statement executes successfully even if the subquery selects multiple rows.
Answer: A,C
NEW QUESTION # 54
In the customers table, the CUST_CITY column contains the value 'Paris' for the
CUST_FIRST_NAME 'Abigail'.
Evaluate the following query:
What would be the outcome?
- A. Abigail PA
- B. Abigail Pa
- C. An error message
- D. Abigail IS
Answer: B
NEW QUESTION # 55
Evaluate the following two queries:
Which statement is true regarding the above two queries?
- A. There would be no change in performance.
- B. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
- C. Performance would improve in query 2.
- D. Performance would degrade in query 2.
Answer: A
NEW QUESTION # 56
Evaluate the following SQL statements that are issued in the given order:
CREATE TABLE emp
(emp_no NUMBER(2) CONSTRAINT emp_emp_no_pk PRIMARY KEY,
ename VARCHAR2(15),
salary NUMBER (8,2),
mgr_no NUMBER(2) CONSTRAINT emp_mgr_fk REFERENCES emp(emp_no));
ALTER TABLE emp
DISABLE CONSTRAINT emp_emp_no_pk CASCADE;
ALTER TABLE emp
ENABLE CONSTRAINT emp_emp_no_pk;
What would be the status of the foreign key EMP_MGR_PK?
- A. It would remain disabled and can be enabled only by dropping the foreign key constraint and recreating it.
- B. It would be automatically enabled and deferred.
- C. It would be automatically enabled and immediate.
- D. It would remain disabled and has to be enabled manually using the ALTER TABLEcommand.
Answer: D
Explanation:
Explanation/Reference:
NEW QUESTION # 57
You must create a table EMPLOYEES in which the values in the columns EMPLOYEES_ID and LOGIN_ID must be unique and not null. (Choose two.) Which two SQL statements would create the required table?
- A. CREATE TABLE employees(employee_id NUMBER,Login_id NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_uk UNIQUE (employee_id, login_id);CONSTRAINT emp_id_nn NOT NULL (employee_id, login_id));
- B. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_pk PRIMARY KEY, Login_id NUMBER UNIQUE, Employee_name VARCHAR2(25),Hire_date DATE);
- C. CREATE TABLE employees(employee_id NUMBER,login_id NUMBER,employee_name VARCHAR2(25),hire_date DATE,CONSTRAINT emp_id_pk PRIMARY KEY (employee_id, login_id));
- D. CREATE TABLE employees(employee_id NUMBER,Login_id NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_ukUNIQUE (employee_id, login_id));
- E. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_nn NOT NULL, Login_id NUMBER CONSTRAINT login_id_nn NOT NULL,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_ukUNIQUE (employee_id, login_id));
Answer: C,E
NEW QUESTION # 58
View the Exhibit and examine the structure of the CUSTOMERS table.
Evaluate the following SQL statement:
Which statement is true regarding the outcome of the above query?
- A. It returns an error because the BETWEEN operator cannot be used in the HAVING clause.
- B. It executes successfully.
- C. It returns an error because WHERE and HAVING clauses cannot be used in the same SELECT statement.
- D. It returns an error because WHERE and HAVING clauses cannot be used to apply conditions on the same column.
Answer: B
NEW QUESTION # 59
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