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polet [3.4K]
4 years ago
11

What is tuple and attribute of a relation​

Computers and Technology
1 answer:
Lorico [155]4 years ago
5 0

Answer:

An attribute value is an attribute name paired with an element of that attribute's domain, and a tuple is a set of attribute values in which no two distinct elements have the same name. Thus, in some accounts, a tuple is described as a function, mapping names to values.

Explanation:

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Answer:

=DSUM(A4:D8, "Unit Cost", A1:B2)

Explanation:

From the list of given options, it's obvious that the question relates to Excel database sum function.

The correct answer among the list of options is:

=DSUM(A4:D8, "Unit Cost", A1:B2)

Where

DSUM represents the function itself

A4:D8 represents the range

"Unit cost" represents the field

and

A1:B2 represents the criteria of the function

Analysing other options:

Option 1: The equality sign (=) before excel formulas is missing

Option 2: Sum is used instead of DSUM and there's a missing bracket before the range

Option 3: There's a missing comma between the range, the field and the criteria

Hence, the last option (4) answers the question.

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3 years ago
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The correct option is 3.
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