Question: When must a comma be used in the SELECT clause of a query? a. When a field name is followed by a column alias b.

When must a comma be used in the SELECT clause of a query?

a. When a field name is followed by a column alias

b. To separate the SELECT clause and the FROM clause when only one field is selected

c. It’s never used in the SELECT clause.

d. When listing more than one field name and the fields aren’t concatenated

e. When an arithmetic expression is included in the SELECT clause

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