Usage of Regr_SLOPE in oracle

The REGR_SLOPE function in Oracle is used to calculate linear regression slope. The syntax is REGR_SLOPE(y, x), where y is the dependent variable and x is the independent variable. Can be used to calculate the slope of a set of data, filter slopes based on conditions, or average data from different sets.

Regr_SLOPE function usage in Oracle

Regr_SLOPE is a function in Oracle , used to calculate the linear regression slope of a set of data.

Syntax

<code>REGR_SLOPE(y, x)</code>

Where:

• y: Array or column of dependent variable
• x: Array or column of independent variables

Usage

1. Calculate linear regression slope

   <code>SELECT REGR_SLOPE(sales, population) FROM cities;</code>

   This query will return the linear regression slope for the city's sales and population data points.

2. Using aggregate functions

   <code>SELECT AVG(REGR_SLOPE(sales, population)) FROM cities GROUP BY region;</code>

   This query will average the linear regression slopes based on the region to which the city belongs.

3. Conditional filtering

   <code>SELECT REGR_SLOPE(sales, population)
   FROM cities
   WHERE population > 1,000,000;</code>

   This query will return the linear regression slope for cities with a population greater than 1,000,000.

Note

• y and x arrays or columns must have the same length .
• Input data must be of numeric type.
• The Regr_SLOPE function returns NaN if there are duplicate values ​​in the argument (x).
• NaN values ​​or null values ​​are excluded from calculations.

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