Question: Which of the following functions can be used to substitute a value for a NULL value? a. NVL b. TRUNC c. NVL2 d. SUBSTR e.

Which of the following functions can be used to substitute a value for a NULL value?

a. NVL

b. TRUNC

c. NVL2

d. SUBSTR

e. Both a and d

f. Both a and c

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