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NEW QUESTION 41
Which three statements are true about sequences in a single instance Oracle database?
- A. A sequence number that was allocated can be rolled back if a transaction fails.
- B. A sequence can only be dropped by a DBA.
- C. Two or more tables cannot have keys generated from the same sequence.
- D. A sequence's unallocated cached values are lost if the instance shuts down.
- E. A sequence can Issue duplicate values.
- F. Sequences can always have gaps.
Answer: C,D,E
NEW QUESTION 42
Which two statements are true about single row functions? (Choose two.)
- A. FLOOR : returns the smallest integer greater than or equal to a specified number
- B. CEIL : can be used for positive and negative numbers
- C. CONCAT : can be used to combine any number of values
- D. TRUNC : can be used with NUMBER and DATE values
- E. MOD : returns the quotient of a division operation
Answer: B,D
NEW QUESTION 43
Evaluate these commands which execute successfully:
Which two statements are true about the ORD_ITEMS table and the ORD_SEQ sequence? (Choose two.)
- A. Column ORD_NO gets the next number from sequence ORD_SEQ whenever a row is inserted into ORD_ITEMS and no explicit value is given for ORD_NO
- B. If sequence ORD_SEQ is dropped then the default value for column ORD_NO will be NULL for rows inserted into ORD_ITEMS
- C. Sequence ORD_SEQ is guaranteed not to generate duplicate numbers
- D. Any user inserting rows into table ORD_ITEMS must have been granted access to sequence ORD_SEQ
- E. Sequence ORD_SEQ cycles back to 1 after every 5000 numbers and can cycle 20 times
Answer: C,D
NEW QUESTION 44
Examine this SQL statement:
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, any one of which can complete the query successfully. (Choose three.)
- A. ORDER BY 2, cust_id
- B. ORDER BY "Last Name"
- C. ORDER BY CUST_NO
- D. ORDER BY 2, 1
- E. ORDER BY "CUST_NO"
Answer: A,C,D
NEW QUESTION 45
Examine this description of the books table containing 100 rows:
Now examine this sequence of statements Issued In a new session;
Examine this description of the books table containing 100 rows:
Which three statements are true?
- A. The first RollBack command restores the row that was inserted.
- B. The second rollback command rolls back the rollback to savepoint a command.
- C. The second rollback command restores the 100 rows that were in the table originally.
- D. The first rollback command leaves the table's 100 original rows locked.
- E. The second rollback command restores the row that was inserted.
- F. The first rollback command restores the 100 rows that were in the table originally.
- G. The first rollback command leaves the inserted row locked.
Answer: A,B,E
NEW QUESTION 46
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