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1Z0-909熱門證照,1Z0-909考試心得 & 1Z0-909熱門題庫
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下載1Z0-909考試題庫

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下載MySQL 8.0 Database Developer考試題庫

NEW QUESTION 25
Examine these commands which execute successfully in the sequence shown in Sessions S1 and S2:

Now, examine this statement that execute successfully in s1:
S1> SELECT * FROM emp;
Which is true about the result of the select statement?

  • A. The inserted row is not returned because the transaction still active in s2.
  • B. The inserted row is returned because the isolation level is RPEATABLE READ in S1.
  • C. The inserted row is returned because the transaction is auto committed in S2.
  • D. The inserted row is not returned because the isolation level is READ COMMITTED in S2.

Answer: A

 

NEW 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 2 does not start a transaction.
  • C. Session 1 does not block Session 2.
  • D. Statements in Session 2 are committed.
  • E. Session 2 takes an exclusive lock on all the rows in the band table.
  • F. Session 1 must commit before the update in Session 2 can complete.

Answer: D,F

 

NEW QUESTION 27
Examine these commands and output:

Which is true?

  • A. A new view is created because the previous was dropped on execution of the drop table statement.
  • B. Existing emp_vuL is dropped and a new emp_vu1 created with the new definition.
  • C. It returns an error because the CREATE TABLE statement automatically recreated the view.
  • D. It returns an error because the DROP TABLE statement did not drop the view.

Answer: D

 

NEW QUESTION 28
Examine the statement which executes successfully:
SET sql_mode=' NO_ENGINE_SUBSTITTJTION' ;
You try to create a table with a storage engine that is not available. What will happen?

  • A. The server will create the table using the default storage engine.
  • B. An error occurs and the create table statement fails.
  • C. The server will create the table but it will be unusable until the specified storage engine is available.
  • D. The server will create the table but report an error when the first attempt to insert a row is performed.

Answer: B

 

NEW QUESTION 29
Examine these MySQL Shell statements:

What is the true about the attempts to add document to the collection?

  • A. First three documents are added, then different number of fields cause an error.
  • B. First two documents are added, then mismatched field names cause an error.
  • C. All documents are added and cause a warning.
  • D. All documents are added without any error or warning.
  • E. First two documents are added, then mismatched field names cause a warning.

Answer: C

 

NEW QUESTION 30
......

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