Q41.

What is window function?

Q42.

What is ROW_NUMBER()?

Q43.

What is RANK() and DENSE_RANK()?

Q44.

What is partitioning in SQL?

Q45.

What is a composite index?

Q46.

What is execution plan?

Q47.

What is EXPLAIN in SQL?

Q48.

What is a schema in SQL?

Q49.

What is data integrity?

Q50.

What is referential integrity?