SQL Uses ________ to Extract Records from a Database by Using

question 19

Multiple Choice

SQL uses ________ to extract records from a database by using English-like expressions that have variables and operations.

• A) Boolean algebra
• B) relational algebra
• C) primary keys
• D) foreign keys

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Definitions:

Contribution Margin Ratio

A financial metric that shows the percentage of sales revenue that exceeds variable costs, indicating how much revenue contributes to fixed costs and profit.

Break-Even Point

The point at which total costs and total revenue are equal, meaning no net loss or gain is incurred.

Variable Manufacturing Costs

Costs that fluctuate with the amount of production output, including expenses like raw materials, direct labor, and other costs that change with production volume.

Fixed Overhead

Costs that do not change with the level of production or sales, including expenses such as rent, salaries, and insurance, which are incurred regardless of business activity levels.