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Oracle 1z1-909 시험 개요:

Oracle 1z1-909 시험 요강 주제:

Oracle MySQL 8.0 Database Developer에 대해 알아야 할 모든 것

최신 MySQL Developer 1z1-909 무료샘플문제

문제 #1

Examine these commands and output:

Which is true?

A. Existing emp_vuL is dropped and a new emp_vu1 created with the new definition.
B. A new view is created because the previous was dropped on execution of the drop table statement.
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.

문제 #2

Examine this statement which executes successfully:

The table is populated with a range of values including jobs for Robert, John, and Katie. Now, examine this statement and output:

Why is an empty result set returned?

A. Table statistics must be updated to generate values for the name column.
B. The select requires json_unquoteo in the where clause.
C. The JSON datatype cannot be used in virtual columns.
D. The virtual values in the name column must be accessed using functions.
E. The json_extract() function requires a length value that matches the field length in the schema.

문제 #3

Examine these statement which execute successfully:

Now, examine this desired output:

Which two queries will produce the out?

A.

B.

C.

D.

E.

문제 #4

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

문제 #5

Examine these commands which execute successfully:
mYsql> CREATE TABLE income (acct_num INT, amount DECIMAL(10,2));
mysql> CREATE TRIGGER subtotal BEFORE INSERT ON income
FOR EACH ROW SET @subtotal = subtotal + NEW.amount;
Which is true for the income table?

A. The trigger body set causes trigger activation.
B. The trigger activates after any row has been inserted into the table.
C. The trigger activates after any row in the table has been updated.
D. Execution of an insert statement causes the trigger to activate.

질문과 대답: