A(n) _____ Join Returns Not Only the Rows Matching the Join

question 28

Multiple Choice

A(n) _____ join returns not only the rows matching the join condition (that is, rows with matching values in the common columns) but also the rows with unmatched values.

• A) outer
• B) inner
• C) equi-
• D) cross

---

Definitions:

Congestion Pricing

A pricing strategy that charges users fees for accessing certain areas during peak times to reduce traffic congestion.

Crowded Roadways

Refers to roads or highways that are filled with vehicles, often leading to slow movement and increased travel time.

Cap-and-Trade

Cap-and-trade is an environmental policy tool that sets a limit (cap) on emissions and allows companies to buy and sell (trade) permits for those emissions, encouraging reductions where they are most cost-effective.

Pollution Control

The process of reducing or eliminating the release of pollutants into the environment, typically involving regulations and technologies designed to minimize environmental damage.