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Download MySQL 8.0 Database Developer Exam Dumps

NEW QUESTION 24
Examine the appointments table definition which contains one million rows:
1Z0-909-4012396ccae4bcf9693a2929687915c7.jpg
Now, examine this statement which executes successfully:
1Z0-909-923cb877fe448a4e058e4bd9e93f8ce6.jpg
Which statement will improve query performance?

  • A. ALTER TABLE appointments add index IX_4<attendant_id, payment, credit)
  • B. ALTER TABLE appointments add index IX_1(credit,payment)
  • C. ALTER TABLE appointments add index IX_3(attendant_id, created_by)
  • D. ALTER TABLE appointments add index IX_2(attendant_session_id, created_by)

Answer: A

 

NEW QUESTION 25
Examine these commands and output:
1Z0-909-4bcf74c113ac8273be2e2e51f755522a.jpg
1Z0-909-5194e2158e7fb98986c8d02a349a55b8.jpg
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 26
Examine the employee table structure:
1z0-909-f3c80b9075c971d5db438c4538e80115.jpg
Which set of statements immediately returns empname for a given emp_id by using a parameterized prepare statement?
A)
1z0-909-acd34358027162e0f4e6dec53b3df106.jpg
1z0-909-18c9578789f0d034ffafed53a199916b.jpg
1z0-909-f56c6db958cdac664337d195dcf593da.jpg
D)
1z0-909-1860c94a9ecd39cc6cc28e43417ccc56.jpg

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

Answer: D

 

NEW QUESTION 27
......

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