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SQL Anywhere 10.0.1 » SQL Anywhere Server - SQL Reference » SQL Functions » Alphabetical list of functions

REGR_AVGY function [Aggregate] Next Page

REGR_COUNT function [Aggregate]


Returns an integer that represents the number of non-NULL number pairs used to fit the regression line.

Syntax 1

REGR_COUNT( dependent-expression , independent-expression )

Syntax 2

REGR_COUNT( dependent-expression , independent-expression )
OVER (
window-spec )

window-spec : see Syntax 2 instructions in the Usage section below

Parameters

dependent-expression    The variable that is affected by the independent variable.

independent-expression    The variable that influences the outcome.

Remarks

This function returns a LONG as the result.

Syntax 2 represents usage as a window function in a SELECT statement. As such, elements of window-spec can be specified either in the function syntax (inline), or in conjunction with a WINDOW clause in the SELECT statement. See the window-spec definition provided in WINDOW clause.

For more information about using window functions in SELECT statements, including working examples, see Window functions.

For more information about the statistical computation performed, see Mathematical formulas for the aggregate functions.

See also
Standards and compatibility
Example

The following example returns a value that indicates the number of non-NULL pairs that were used to fit the regression line. This function returns the value 75.

SELECT REGR_COUNT( Salary, ( YEAR( NOW() ) - YEAR( BirthDate ) ) )
FROM Employees;