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Oracle MySQL 8.0 Database Developer Sample Questions (Q15-Q20):
NEW QUESTION # 15
Which select statement returns true?
- A. SELECT NULL := NULL;
- B. SELECT NULL = NULL;
- C. SELECT NULL NULL;
- D. SELECT NULL = NULL;
Answer: A
NEW QUESTION # 16
Examine this statement and output:
Which will provide the same level of detail when the error is encountered within a stored routine?
- A.
- B.
- C.
- D.
Answer: B
NEW QUESTION # 17
Examine this statement that execute successfully in an interactive session:
The user running this session now goes to lunch for an hour.
Now, examine these statements executed independently in separate sessions while Session 0 is still active:
How many of them will complete while Session 0 is still active?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
- F. 5
Answer: B
NEW QUESTION # 18
Examine this statement and output:
CREATE TABLE geom (g GEOMETRY NOT NOLL, SPATIAL INDEX(g) ) ; Query OK, 0 rows affected, 1 warning (0.01 sec) An attempt is made to add an SRID attribute to the column using the statement:
ALTER TABLE geom MODIFY COLUMN g geometry NOT NULL SRID 0;
Which is true?
- A. An error is generated because the index prevents changes to the column.
- B. An error is generated because srid o is an invalid identifier value.
- C. Execution succeeds with a warning.
- D. Execution succeeds and allows the use of the index by the optimizer.
Answer: A
NEW QUESTION # 19
The employee table includes these columns:
e_id INT, e_name VARCHAR (45), dept_id INT salart INT
You must create a stored function, getMaxSalary(), which returns the maximum salary paid for a given department id.
Which statement will create the function?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 20
......
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