MCQs: Which is not a valid aggregate function?
(A). MAX
(B). MIN
(C). power()
(D). COUNT
Solved Answer: (C). power()
| Aggregate Function |
Non-aggregate functions
( Arithmetic Function) |
Non-aggregate functions
( Character Function) |
| Aggregate functions run on many records and produce a summary |
Scalar functions run on each record individually and independently |
Examples
- AVG – Helpful to find the average of a set of values.
- COUNT – counts rows in a specified table or view.
- MIN – Helpful to find the minimum value in a set of values.
- MAX – Helpful to find the maximum value in a set of values.
- SUM – Helpful to find the sum of values.
|
Examples
ceil():
floor()
power()
sqrt()
mod(): remainder from a division
abs(): |
Examples
translate(): replaces a sequence of characters in a string with another sequence of characters.
trim(): removes leading and trailing characters(or both) from a character string.
lower(): convert all characters of a string to lower case
upper(): convert all characters of a string to uppercase.
|
(A). MAX
(B). MIN
(C). sum
(D). All of these
Solved Answer: (D). All of these
MCQs: Which is not a valid aggregate function?
(A). MAX
(B). MIN
(C). sum
(D). None of these
Solved Answer: (D). None of these
Highly Recommended Database Important MCQs with Explanation
- Which of the following is not an aggregate function?
- Which of the following is not a Scalar function?
- In some database programs, a data file is referred to as a(n) ______.
- Which is the common data structure to implement a relational database?
