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> Mirror of <https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/dot-product.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.

# `DOT_PRODUCT`

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

Computes the conventional dot product (scalar product) of two vectors.

*   `<array1>`: The first vector (`array(real)` or `array(double precision)`).
*   `<array2>`: The second vector (`array(real)` or `array(double precision)`).

Returns a double-precision value that represents the dot product of the two vectors.

*   Both input arrays must be of the same element type and length.
*   If any element is NULL, the result is NULL.
*   For optimal performance, use array definitions with non-nullable elements such as `array(real not null)`.

Compute the dot product of two vectors.

Returns `-6.0`, calculated as (1 × -1) + (2 ×2 ) + (3 × -3) = -1 + 4 - 9 = -6.

*   [Array Data Type](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/array.html)

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