Every year World Economic Forum (WEF) holds its annual

If every non-key attribute is functionally dependent on the primary key, the relation will be in

Query optimization heuristics often include:

 What is the primary purpose of a "Trigger" in a database?

In PL/SQL, a `CURSOR` is used to:

Which of the following operators is used to compare a value to a list of literal values that have been specified?

What does re.sub(r'(\w+)', r'_\1_', 'hello world') return?

Deadlock occurs when:

In a relational database, what is a foreign key?

Consider the following Java-like pseudo-code for inserting a node into a Binary Search Tree (BST):

    ```java

    class Node {