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Candidates who pass the Oracle 1z1-071 certification exam are eligible to receive the Oracle Database SQL certification. Oracle Database SQL certification is valid for a period of three years, after which candidates will need to recertify to maintain their certification.

Oracle Database SQL Sample Questions (Q148-Q153):

NEW QUESTION # 148
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. Employees 100 will have JOB_ID set to the same value as the JOB_ID of employee 200
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. Employee 200 will have JOB_ID set to the same value as the JOB_ID of employee 100
E. Employee 200 will have SALARY set to the same value as the SALARY of employee 100
F. Employee 100 will have SALARY set to the same value as the SALARY of employee 200

Answer: A,F

NEW QUESTION # 149
The INVOICEtable has a QTY_SOLDcolumn of data type NUMBER and an INVOICE_DATEcolumn of data type DATE.
NLS_DATE_FORMATis set to DD-MON-RR.
Which two are true about data type conversions involving these columns in query expressions? (Choose two.)

A. CONCAT(qty_sold, invoice_date): requires explicit conversion
B. invoice_date > '01-02-2019': uses implicit conversion
C. qty_sold BETWEEN '101' AND '110': uses implicit conversion
D. invoice_date = '15-march-2019': uses implicit conversion
E. qty_sold = '0554982': requires explicit conversion

Answer: C,D

Explanation:
Explanation/Reference:

NEW QUESTION # 150
.No user-defined locks are used in your database.
Which three are true about Transaction Control Language (TCL)?

A. ROLLBACK without the TO SAVEPOINT clause undoes alt the transaction's changes, releases its locks, and erases all its savepoints.
B. ROLLBACK without the TO SAVEPOINT clause undoes all the transaction's changes but does not release its locks.
C. COMMIT ends the transaction and makes all its changes permanent.
D. ROLLBACK to SAVEPOTNT undoes the transaction's changes made since the named savepoint and then ends the transaction.
E. ROLLBACK without the TO SAVEPOINT clause undoes all the transaction's changes but does not erase its savepoints.
F. COMMIT erases all the transaction's savepoints and releases its locks.

Answer: A,C,F

Explanation:
For Transaction Control Language (TCL) operations:
* A. COMMIT erases all the transaction's savepoints and releases its locks: When a COMMIT operation is executed, it finalizes all changes made during the transaction, removes any savepoints that have been set during the transaction, and releases any locks held on the database objects by the transaction.
* B. COMMIT ends the transaction and makes all its changes permanent: A COMMIT command completes the transaction, making all data modifications permanent and visible to other sessions.
* E. ROLLBACK without the TO SAVEPOINT clause undoes all the transaction's changes, releases its locks, and erases all its savepoints: The ROLLBACK command, when used without specifying a SAVEPOINT, undoes all changes made during the transaction, releases any locks held, and removes any savepoints that were established during the transaction.
Incorrect options:
* C: ROLLBACK, without any specification, not only undoes all the transaction's changes but also releases all locks held by the transaction.
* D: ROLLBACK to a SAVEPOINT only undoes changes up to the named savepoint and does not end the transaction; the transaction continues until a COMMIT or a full ROLLBACK is issued.
* F: ROLLBACK without a TO SAVEPOINT clause also erases all savepoints created during the transaction.

NEW QUESTION # 151
Which two are true about unused columns?

A. Once a column has been set to unused, a new column with the same name can be added to the table.
B. A query can return data from unused columns, but no DML is possible on those columns.
C. A foreign key column cannot be set to unused.
D. A primary key column cannot be set to unused.
E. The DESCRIBE command displays unused columns
F. Unused columns retain their data until they are dropped

Answer: A,F

NEW QUESTION # 152
Which two statements are true about Entity Relationships?

A. A Relationship can be mandatory for both entities
B. A one-to-one relationship is always a self-referencing relationship
C. A many-to-many relationship can be implemented only by using foreign keys
D. A table name can be specified just once when selecting data from a table having a selfreferencing relationship
E. A one-to-many relationship in one direction is a one-to-one relationship in the other direction

Answer: A

Explanation:
A relationship in an Entity-Relationship (ER) model can indeed be mandatory for both entities, meaning that an instance of one entity must relate to one and only one instance of another entity, and vice versa. This is commonly seen in a one-to-one relationship where both sides are mandatory.
Option B is incorrect; a one-to-one relationship does not have to be self-referencing. Self-referencing (or recursive) relationships occur when an entity has a relationship with itself.
Option C is incorrect; a many-to-many relationship typically requires a join table or associative entity with foreign keys that reference the primary keys of the two entities it connects.
Option D is incorrect; in the case of a self-referencing relationship, you may need to use aliases to specify the table more than once to differentiate between the self-referenced columns.
Option E is incorrect because a one-to-many relationship in one direction does not equate to a one-to-one relationship in the opposite direction.
Reference:
Entity-Relationship Model Concepts: ER Model

NEW QUESTION # 153
......

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1z0-071 Certification Exam Infor, 1z0-071 Valid Mock Test

Oracle 1z0-071 Certification Exam Infor: Oracle Database SQL - itPass4sure Help you Prepare Efficiently

Oracle Database SQL Sample Questions (Q148-Q153):

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