Multiple choice technology databases

Given the following table: TEMP_DATA TEMP DATE _____________ 45    12/25/2006 51    12/26/2006 67    12/27/2006 72    12/28/2006 34    12/29/2006 42    12/30/2006 And the following SQL statement: TE FUNCTION degf_to_c (temp INTEGER) RETURNS INTEGER LANGUAGE SQL CONTAINS SQL NO EXTERNAL ACTION DETERMINISTIC BEGIN ATOMIC DECLARE newtemp INTEGER; SET newtemp = temp - 32; SET newtemp = newtemp * 5; RETURN newtemp / 9; END Which two of the following SQL statements illustrate the proper way to invoke the calar function DEGF_TO_C?

  1. VALUES degf_to_c(32)

  2. SELECT date, degf_to_c(temp) AS temp_c FROM temp_data

  3. CALL degf_to_c(32)

  4. Both a and b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Scalar functions in DB2 can be invoked using VALUES clause (A) for direct function calls returning a single value, or within a SELECT statement (B) to apply the function to each row. Option C (CALL) is used for stored procedures, not scalar functions. Option D is correct because both A and B demonstrate proper scalar function invocation syntax.

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