Examlex
Which of the following is NOT a good candidate for a primary key field for a Customer table?
Average Tax Rate
The ratio of the total amount of taxes paid to the total tax base (taxable income or spending), expressed as a percentage.
Taxable Income
The amount of an individual's or a corporation's income used to determine how much tax they owe, after exemptions and deductions are factored in.
Marginal Tax Rate
The rate of tax applied to the next dollar of taxable income, indicating the percentage of any additional income that will be taken as tax.
Average Tax Rate
The proportion of total income paid in taxes, calculated by dividing the total tax amount by the taxpayer's total income.
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