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> Mirror of <https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/corr.html> (Salesforce, Data 360 Query Guide), read 2026-10-23. Salesforce's own page is the authority; this copy exists because that site refuses non-browser readers.

## `CORR`

**Applies to:** ✅ Data 360 SQL ✅ Tableau Hyper API

Computes the correlation coefficient between two sets of values.

*   `<Y>`: A `double precision` expression representing the dependent variable.
*   `<X>`: A `double precision` expression representing the independent variable.

Returns a `double precision` value representing the correlation coefficient, ranging from -1 to 1. Returns NULL if the computation is meaningless (e.g., no valid input pairs).

*   Returns NULL if there are no rows where both X and Y are non-null.
*   A value of 1 indicates perfect positive correlation.
*   A value of -1 indicates perfect negative correlation.
*   A value of 0 indicates no linear correlation.

Find the correlation between two variables.

Calculate correlation for each category.

*   [COVAR_POP](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/covar-pop.html)
*   [COVAR_SAMP](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/covar-samp.html)
*   [Aggregate Functions](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/aggregate.html)


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