4D v16

COUNT

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4D v16

4D - SQL Reference

Functions

COUNT



	Command COUNTCOUNT ({ [ [ALL \|DISTINCT] arithmetic_expression] \|* } )

Beschreibung

The COUNT function returns the number of non-null values in the arithmetic_expression. The optional ALL and DISTINCT keywords are used to respectively retain or eliminate any duplicate values.

If you pass the * instead, the function returns the total number of records in the arithmetic_expression, including duplicate and NULL values.

Example

This example returns the number of movies from the MOVIES table:

SELECT COUNT(*) 
FROM MOVIES

Siehe auch

AVG
SUM

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