Multiple choice technology databases

Which statement best describes the GROUPING function?

  1. used to set the order for the groups to be used for calculating the grand totals and subtotals

  2. used to form various groups to caculate totals and subtotals created using ROLLUP and CUBE operators

  3. used to specify if the NULLL value in an expresion is a stored NULL value or created by ROLLUP and CUBE

  4. used to specify the concatenated groups expressions to be used for calculating the grand totals and subtotals
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The GROUPING function determines whether a NULL value in a row's result set is a naturally stored NULL value or a NULL created by a ROLLUP or CUBE operation to represent a subtotal or grand total, returning 1 for generated NULLs and 0 otherwise.

AI explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) used to set the order for the groups to be used for calculating the grand totals and subtotals - This option is incorrect. The GROUPING function is not used to set the order of groups. It is used to specify if a NULL value in an expression is a stored NULL value or created by the ROLLUP and CUBE operators.

Option B) used to form various groups to calculate totals and subtotals created using ROLLUP and CUBE operators - This option is incorrect. The GROUPING function is not used to form groups. It is used to determine if a NULL value in an expression is a stored NULL value or created by the ROLLUP and CUBE operators.

Option C) used to specify if the NULL value in an expression is a stored NULL value or created by ROLLUP and CUBE - This option is correct. The GROUPING function is used to determine whether a NULL value in an expression is a stored NULL value or created by the ROLLUP and CUBE operators.

Option D) used to specify the concatenated group expressions to be used for calculating the grand totals and subtotals - This option is incorrect. The GROUPING function is not used to specify concatenated group expressions. It is used to determine if a NULL value in an expression is a stored NULL value or created by the ROLLUP and CUBE operators.

The correct answer is Option C. This option is correct because the GROUPING function is used to specify if a NULL value in an expression is a stored NULL value or created by the ROLLUP and CUBE operators.

Keep practicing — related questions