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The 1Z0-909 exam consists of 70 multiple-choice questions and has a time limit of 105 minutes. The exam covers a range of topics including MySQL architecture, data types, SQL statements, database security, performance tuning, and database administration. Candidates must achieve a score of at least 63% to pass the exam and earn the Oracle Certified Professional, MySQL 8.0 Database Developer certification. This certification is recognized globally and can help developers advance their careers in the field of MySQL database development.

The Oracle 1z1-909 exam covers a wide range of topics, including database design principles, SQL programming, database administration, and performance tuning. It is a challenging exam that requires a strong understanding of MySQL 8.0 and its various features and functionalities. Candidates who successfully pass the exam will have a deep understanding of database development and be able to design and implement complex database solutions.

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Oracle MySQL 8.0 Database Developer Sample Questions (Q34-Q39):

NEW QUESTION # 34
The meeting table stores meeting schedules with participants from five continents. The participants' details are stored in another table.

You need to adjust the start_time and duration columns for optimal storage. What datatype changes would achieve this?

A. start_time TIMESTAMP duration TIMESTAMP
B. start_time TIME duration TIME
C. start_time TIMESTAMP duration TIME
D. start_time DATETIME duration DATETIME
E. start__time DATETIME duration TIME

Answer: D

NEW QUESTION # 35
Examine these commands and output:

Which is true about the execution of the insert statement?

A. It inserts a row in the view and base table.
B. It returns an error.
C. It inserts a new row in the base table only.
D. It inserts a new row in the view only.

Answer: D

NEW QUESTION # 36
The employee table includes these columns:
e_id INT, e_name VARCHAR (45), dept_id INT salart INT
You must create a stored function, getMaxSalary(), which returns the maximum salary paid for a given department id.
Which statement will create the function?
A)

B)

C)

D)

A. Option B
B. Option C
C. Option D
D. Option A

Answer: D

NEW QUESTION # 37
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. The JSON datatype cannot be used in virtual columns.
B. The select requires json_unquoteo in the where clause.
C. Table statistics must be updated to generate values for the name column.
D. The json_extract() function requires a length value that matches the field length in the schema.
E. The virtual values in the name column must be accessed using functions.

Answer: A

NEW QUESTION # 38
Which two are true about indexes?

A. Indexes are used to enforce unique constraints.
B. Secondary index access will always be faster than a table scan.
C. Indexes reduce disk space used.
D. Indexing all of a table's columns improves performance.
E. Indexes contain rows sorted by key values.

Answer: C,D

NEW QUESTION # 39
......

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