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Update docs/en/sql-reference/aggregate-functions/reference/deltasum.md

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Co-authored-by: Anna <42538400+adevyatova@users.noreply.github.com>
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@ -9,7 +9,7 @@ Sums the arithmetic difference between consecutive rows. If the difference is ne
Note that the underlying data must be sorted for this function to work properly.
!!! info "Note"
If you would like to use this function in a [materialized view](../../../sql-reference/statements/create/view.md#materialized), you most likely want to use the [deltaSumTimestamp](../../../sql-reference/aggregate-functions/reference/deltasumtimestamp.md#agg_functions-deltasumtimestamp) method instead.
The underlying data must be sorted for this function to work properly. If you would like to use this function in a [materialized view](../../../sql-reference/statements/create/view.md#materialized), you most likely want to use the [deltaSumTimestamp](../../../sql-reference/aggregate-functions/reference/deltasumtimestamp.md#agg_functions-deltasumtimestamp) method instead.
**Syntax**