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Knowledge Oracle 1z1-071 Points | 1z1-071 Exam Tutorial

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Oracle Database SQL Sample Questions (Q134-Q139):

NEW QUESTION # 134
Examine the description of the ORDERS table:

Which three statements execute successfully?

A. SELECT * FROM orders ORDER BY order_ id
UNION
SELECT * FROM invoices;
B. SELECT * FROM orders ORDER BY order_ id
INTERSEOT
SELECT * FROM invoices ORDER BY invoice_ id;
C. SELECT order_ id, invoice_ data order_ date FROM orders
MINUS
SELECT invoice_ id, invoice_ data FROM invoices ORDER BY invoice_ id;
D. (SELECT * FROM orders
UNION ALL
SELECT* FROM invoices) ORDER BY order _id;
E. SELECT order_ id, order_ data FROM orders
UNION ALL
SELECT invoice_ id, invoice_ data FROM invoices ORDER BY order_ id;
F. SELECE order _id, order _ date FRON orders
LNTERSECT
SELECT invoice_ id, invoice_ id, order_ date FROM orders
G. SELECT * FROM orders
MINUS
SELECT * FROM INVOICES ORDER BY 1

Answer: A,D,E

Explanation:
In Oracle SQL, set operations like UNION, UNION ALL, INTERSECT, and MINUS can be used to combine results from different queries:
Option A:
Combining results using UNION ALL followed by ORDER BY will execute successfully because UNION ALL allows duplicate rows and ORDER BY can be used to sort the combined result set.
Option E:
Similar to option A, UNION ALL combines all rows from the two selects and allows ordering of the results.
Option G:
UNION combines the results from two queries and removes duplicates, and ORDER BY can be used to sort the final result set.
Options B, C, D, and F are incorrect because:
Option B: You cannot intersect different columns (ORDER_ID with INVOICE_ID).
Option C: Incorrect column names and syntax with ORDER BY.
Option D: ORDER BY cannot be used before a set operator like INTERSECT.
Option F: ORDER BY cannot be used directly after a MINUS operator without wrapping the MINUS operation in a subquery.

NEW QUESTION # 135
Which statement adds a column called SALARYto the EMPLOYEEStable having 100 rows, which cannot contain null?
ALTER TABLE EMPLOYEES

A. ADD SALARY NUMBER(8,2) DEFAULT 0 NOT NULL;
ALTER TABLE EMPLOYEES
B. ADD SALARY NUMBER(8,2) DEFAULT CONSTRAINT p_nn NOT NULL;
ALTER TABLE EMPLOYEES
C. ADD SALARY NUMBER(8,2) DEFAULT NOT NULL;
ALTER TABLE EMPLOYEES
D. ADD SALARY NUMBER(8,2) NOT NULL;

Answer: A

NEW QUESTION # 136
* MANAGER is an existing role with no privileges or roles.
* EMP is an existing role containing the CREATE TABLEprivilege.
* EMPLOYEES is an existing table in the HR schema.
Which two commands execute successfully?

A. GRANT CREATE ANY SESSION, CREATE ANY TABLE TO manager;
B. GRANT CREATE SEQUENCE TO manager, emp;
C. GRANT SELECT, INSERT ON hr.employees TO manager WITH GRANT OPTION;
D. GRANT CREATE TABLE, emp TP manager;
E. GRANT CREATE TABLE, SELECT ON hr.employees TO manager;

Answer: B,C

NEW QUESTION # 137
Which two are true about savepoints?

A. After issuing a savepoint, you can roll back to the savepoint name within the current transaction.
B. They make uncommitted updates visible to other sessions owned by the? same user.
C. They make uncommitted updates visible to sessions owned by other users.
D. You can commit updates done between two savepoints without committing other updates In the current transaction.
E. A rollback to savepoint command issued before the start of a transaction results In an error.
F. After issuing a savepoint, you cannot roll back the complete transaction.

Answer: A,B

NEW QUESTION # 138
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEE_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:

Which two statements are true? (Choose two.)

A. Employee 200 will have JOB_ID set to the same value as the JOB_ID of employee 100
B. Employees 100 and 200 will have the same SALARY as before the update command
C. Employees 100 and 200 will have the same JOB_ID as before the update command
D. Employees 100 will have JOB_ID set to the same value as the JOB_ID of employee 200
E. Employee 100 will have SALARY set to the same value as the SALARY of employee 200
F. Employee 200 will have SALARY set to the same value as the SALARY of employee 100

Answer: D,E

NEW QUESTION # 139
......

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