Function - count (size of|length)

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About

Counting occurs with cardinal numbers.

Counting is a way to describe the size of a collection. Ie Statistics - Sample size (N)




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Model Funny
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Aggregate functions return a single value calculated or selected from values that are in a aggregation relationship (ie a set) This values are also known as summary because they try to summarize...
ℝ ℚ ℤ ℕ
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count in SQL count the number of row in a relation (table, query,...). column
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Count is an action
Card Puncher Data Processing
Statistics - Sample size (N)

The size of the sample. Ie the count of case. Sample size drives and determine sampling error, influence the t-value and the p-value.



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