Oracle MySQL 8.0 Database Developer - 1z1-909무료 덤프문제 풀어보기

A. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.

B. An AUTO_INCREMENT column must be indexed.

C. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.

D. A table can have multiple AUTO_INCREMENT columns.

E. The decimal data type supports AUTO_INCREMENT.

A. Results are sent to the calling PHP process for buffering.

B. Buffered queries are enabled by default.

C. Buffered queries should be used on large tables when the result size is unknown.

D. Additional queries on the same session are blocked until the result set is released.

E. Results are sent from the server to the browser for buffering.

F. Buffered queries must be explicitly enabled using mysqliuseresult.

G. Large results can have a negative impact on performance.

A. myview was defined with the temptable processing algorithm.

B. The underlying table's index on the Name column is not chosen because of low selectivity.

C. myview cannot be automatically indexed.

D. Column Name in myview can be indexed if the is_updatable attribute is true.

A. 0

B. 2

C. 3

D. 1

E. 4

F. 5

A. It chooses the transaction with the least accumulated CPU time.

B. It chooses the transaction with the most modified rows.

C. It chooses the transaction with the lowest transaction ID.

D. It chooses the transaction with the fewest modified rows.

E. It chooses the transaction randomly.

F. It chooses the transaction with the most accumulated CPU time.

A. It displays the total number of errors, warnings, and notes since the server last restarted.

B. It displays similar diagnostics results as get diagnostics.

C. It displays errors messages only, since the start time of the current session.

D. It cannot display information for more than max_errot_count server system variable setting.

E. It displays errors messages only, since the server last restarted.

F. It displays the total number of errors, warnings, and notes since the beginning of the current session.

A. SELECT last_name, ' , ',first_name FROM employees;

B. SELECT last_name + ', ' + first_name FROM employees;

C. SELECT GROUP_CONCAT(last_name, first_name) FROM employees;

D. SELECT CONCAT(last name,', ',first_name) FROM employees;

E. SELECT CONCAT_WS(', ',last_name,first_name) FROM employees;