PostgreSQL can be used from just about any major programming language, including C, C++, Perl, Python, Java, Tcl, and PHP.

The value NULL, in database terminology, means?

With table inheritance, not null and check constraints are inherited.

What do you call the application that makes requests of the PostgreSQL server?

What is the wrapper around the SQL command CREATE DATABASE?

When retrieving data in a particular table, we use the_____________ statement.

When should sub queries be used?

Can you define variables in PostgreSQL pl/pgSQL whose value cannot be null?

Which of the following holds true for functions in PostgreSQL?

There is a table t upon which a primary key constraint by the name pk is applied. What will be the correct syntax to drop the constraint?

Which of the following is not defined in the PL/pgSQL?