# regr_sxy

> For the complete documentation index, see [llms.txt](https://docs.redpanda.com/llms.txt). Component-specific: [cloud-data-platform-full.txt](https://docs.redpanda.com/cloud-data-platform-full.txt)

---
title: regr_sxy
latest-operator-version: v26.1.4
latest-console-tag: v3.7.3
latest-connect-version: 4.93.0
latest-redpanda-tag: v26.1.9
docname: sql/sql-functions/aggregate-functions/statistics/regr-sxy
page-component-name: cloud-data-platform
page-version: master
page-component-version: master
page-component-title: Cloud
page-relative-src-path: sql/sql-functions/aggregate-functions/statistics/regr-sxy.adoc
page-edit-url: https://github.com/redpanda-data/cloud-docs/edit/main/modules/reference/pages/sql/sql-functions/aggregate-functions/statistics/regr-sxy.adoc
description: The `regr_sxy()` aggregate function calculates the sum of products of deviations for the dependent variable (y) and the independent variable (x) in a linear regression analysis.
page-topic-type: reference
page-git-created-date: "2026-05-26"
page-git-modified-date: "2026-05-26"
---

<!-- Source: https://docs.redpanda.com/cloud-data-platform/reference/sql/sql-functions/aggregate-functions/statistics/regr-sxy.md -->

The `regr_sxy()` aggregate function calculates the sum of products of deviations for the dependent variable (y) and the independent variable (x) in a linear regression analysis. This value represents the covariance-like term used to compute the slope of the regression line.

## [](#syntax)Syntax

The syntax for this function is:

```sql
REGR_SXY(y, x)
```

## [](#parameters)Parameters

-   `y`: Variable being predicted.

-   `x`: Variable used for prediction.


## [](#examples)Examples

This example uses a simplified version of the `film` table from the Pagila database, containing only the `title`, `length` and `rating` columns. The complete schema for the `film` table can be found on the [Pagila](https://www.postgresql.org/ftp/projects/pgFoundry/dbsamples/pagila/pagila/) database website.

```sql
DROP TABLE IF EXISTS film;
CREATE TABLE film (
  title text NOT NULL,
  length int,
  rating int
);
INSERT INTO film(title, length, rating) VALUES
  ('ATTRACTION NEWTON', 83, 5),
  ('CHRISTMAS MOONSHINE', 150, 7),
  ('DANGEROUS UPTOWN', 121, 4),
  ('KILL BROTHERHOOD', 54, 3),
  ('HALLOWEEN NUTS', 47, 5),
  ('HOURS RAGE', 122, 7),
  ('PIANIST OUTFIELD', 136, 7),
  ('PICKUP DRIVING', 77, 3),
  ('INDEPENDENCE HOTEL', 157, 7),
  ('PRIVATE DROP', 106, 4),
  ('SAINTS BRIDE', 125, 3),
  ('FOREVER CANDIDATE', 131, 7),
  ('MILLION ACE', 142, 5),
  ('SLEEPY JAPANESE', 137, 4),
  ('WRATH MILE', 176, 7),
  ('YOUTH KICK', 179, 7),
  ('CLOCKWORK PARADISE', 143, 5);
```

This query uses the `regr_sxy()` function to calculate the sum of products of deviations for non-null pair of `rating` and `length`:

```sql
SELECT
    REGR_SXY(rating, length) AS SumOfSquaresXY
FROM film;
```

The query returns:

```sql
  sumofsquaresxy
-------------------
 612.4705882352937
(1 row)
```