MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Use AutoSum by selecting a range of cells that contains at least one numeric value. Then on the Formulas tab, click AutoSum > Count Numbers.

Detailed explanation-2: -COUNT(*) with GROUP BY returns the number of rows in each group. This includes NULL values and duplicates. COUNT(ALL <expression>) evaluates expression for each row in a group, and returns the number of nonnull values.

Detailed explanation-3: -The COUNT function counts the number of cells that contain numbers, and counts numbers within the list of arguments. Use the COUNT function to get the number of entries in a number field that is in a range or array of numbers.

Detailed explanation-4: -An aggregate function in SQL returns one value after calculating multiple values of a column. We often use aggregate functions with the GROUP BY and HAVING clauses of the SELECT statement. Various types of SQL aggregate functions are: Count()