Question 16 :
Information systems and organizations do not just influence each other; they create each other.
Question 17 :
Adding null columns to a table is straightforward.
Question 18 :
The NOT EXISTS keyword will be true if any row in the subquery meets the condition.
Question 19 :
Dependency graphs are diagrams that consist of nodes and arcs that show the dependencies of a database.
Question 20 :
The EXISTS keyword will be true if any row in the subquery meets the condition.