-- Functions in SQL are reusable blocks of code that perform specific operations on data. -- They can be built-in (like COUNT (), AVG (), SUM ()) or user-defined to handle custom logic. -- Functions ...

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POWER ( m, n ) m = value, n = exponent m raised to the nth power ROUND ( m [, n ] ) m = value, n = number of decimal places, default 0 m rounded to the nth decimal place TRUNC ( m [, n ] ) m = value, ...