Oracle 1Z0-909 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 1Z0-909
Exam Name/Title: MySQL 8.0 Database Developer
Certification Provider: Oracle
Corresponding Certification: MySQL Developer

Exam Questions: 66
Updated On: Jul 07, 2026

Question #22

Examine this bar graph based on columns from the players table:

Which two statements would generate this bar graph?

A. SELECT Name, Gender, Sport, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

B. SELECT Name, Gender, Sport, REPEAT('# 'Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

C. SELECT Name, Gender, Sport, CHAR_LENGTH ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

D. SELECT Name, Gender, Sport, LENGTH (GPA*10, '# ') AS GPA_Graph FROM players ORDER BY GPA DESC;

E. SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

Discussion 0

Correct Answer: B,E Vote an answer

Question #23

Examine these commands and output:

Which is true about the execution of the insert statement?

A. It inserts a new row in the view only.

B. It returns an error.

C. It inserts a row in the view and base table.

D. It inserts a new row in the base table only.

Discussion 0

Correct Answer: A Vote an answer

Question #24

Examine this statement:
DECLARE not_found CONDITION FOR SQLSTATE '02000';
In which two statements can not found be used?

A. in a handler declaration

B. in an if statement

C. in a leave statement to exit a loop

D. in a signal statement

E. in a while loop

Discussion 0

Correct Answer: D,E Vote an answer

Question #25

Examine these statement which execute successfully:

Now, examine the statements executed in the mysqi command-line client:

What is true?

Discussion 0

Correct Answer: B Vote an answer

Question #26

Examine these statements issued from Session 1 which execute successfully:

Now, examine these statements issued from Session 2 which execute successfully:
Session 2>
BEGIN;
UPDATE band SET song=CONCAT ("Here Comes the ", song) WHERE song LIKE ' %Sun ; Which two are true?

A. Session 1 takes a shared lock on all the rows in the band table.

B. Session 1 must commit before the update in Session 2 can complete.

C. Session 2 does not start a transaction.

D. Session 1 does not block Session 2.

E. Session 2 takes an exclusive lock on all the rows in the band table.

F. Statements in Session 2 are committed.

Discussion 0

Correct Answer: B,F Vote an answer

Question #27

Examine these statements which execute successfully:

Which two changes will improve this query performance?

A. CREATE INDEX 1X5 ON users (loc_id);

B. CREATE INDEX 1X3 ON locations <loc_site_id) ;

C. CREATE INDEX 1X6 ON users (user_name);

D. CREATE INDEX 1X2 ON locations (loc_mapping) USING HASH; fH

E. CREATE INDEX 1X7 ON users (user_name) USING HASH;

F. CREATE INDEX 1X4 ON Locations (site_id, loc_shared);

G. CREATE INDEX IX1 ON locations (loc_shareci) ;

Discussion 0

Correct Answer: C,E Vote an answer

Question #28

The variables c and d are declared as integer types.
Examine these initialization statements with placeholder value <p1>, which execute successfully:
Now, examine this loop which executes successfully:

Which loop results in the same value of d for all valid values of <p1>?
A)

A. Option B

B. Option D

C. Option C

D. Option A

Discussion 0

Correct Answer: D Vote an answer

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