Online Access Free 1Z0-909 Practice Test

Examine these statements and output:

Now, examine this command:
Mysql> ROLLBACK;
What is true about the effect of the command?

• A.It undoes the insert command.
• B.It has no effect.
• C.It undoes the update command.
• D.It undoes both insert and update commands.
• E.It returns an error because there is no active transaction.

Examine the output:

Which explain command will obtain the output?

• A.EXPLAIN PORMAT^TRADITIONAL
• B.EXPLAIN PORMAT=JSON
• C.EXPLAIN PARTITIONS
• D.EXPLAIN ANALYZE
• E.EXPLAIN FORMAT=TREE

Which two statements are true about AUTO_INCREMENT?

• A.A table can have multiple AUTO_INCREMENT columns.
• B.An AUTO_INCREMENT column must be indexed.
• C.A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
• D.The decimal data type supports AUTO_INCREMENT.
• E.AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.

Which statement is true about the show errors command?

• A.It displays similar diagnostics results as get diagnostics.
• B.It displays errors messages only, since the server last restarted.
• C.It displays the total number of errors, warnings, and notes since the server last restarted.
• D.It displays errors messages only, since the start time of the current session.
• E.It cannot display information for more than max_errot_count server system variable setting.
• F.It displays the total number of errors, warnings, and notes since the beginning of the current session.

Examine this statement and output:

Now, examine these desired output values:

Which statement updates the table data as require

• A.UPDATE exam_result SET score=ROUND(score,1);
• B.UPDATE exam_result SET score=CEIL(TRUNCATE(sco
• C.UPDATE exam_result SET score=CEIL(ROUND(score,1));
• D.UPDATE examresult SET score=ROUND(CEIL(score
• E.UPDATE exam_result SET score=TRUNCATE(score,1);
• F.UPDATE exam_result SET score=TRUNCATE