Q81.

What is query execution plan analysis?

Q82.

What are triggers performance impacts?

Q83.

What is database deadlock detection?

Q84.

What is transaction log?

Q85.

How does MVCC work?

Q86.

What is database isolation implementation?

Q87.

What is window frame clause?

Q88.

What is lateral join?

Q89.

Explain advanced window functions.

Q90.

What is pivot and unpivot?