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What values does the count(*) function ignore?

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+1 vote
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in RDBMS by (118k points)
What values does the count(*) function ignore?

(a) Repetitive values

(b) Null values

(c) Characters

(d) Integers

The question was asked in semester exam.

The doubt is from Aggregate Functions in section Introduction to Relational Model and Sql of RDBMS

1 Answer

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Best answer
Right choice is (b) Null values

The best I can explain: The count(*) aggregation function ignores null values while calculating the number of values in a particular attribute.

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