Multiple choice

UPPER(), ABS(), CONCAT() are examples of

  1. Aggregate Functions

  2. Constraints

  3. Scalar functions

  4. Filters

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Scalar functions perform an operation on a single value and return a single value. For example, UPPER() converts a single string to uppercase, ABS() returns the absolute value of a single number, and CONCAT() joins strings row-by-row, unlike aggregate functions which operate on a set of rows.

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