---
toc_priority: 141
---

# deltaSum {#agg_functions-deltasum}

Sums the arithmetic difference between consecutive rows. If the difference is negative, it is ignored.

**Syntax**

``` sql
deltaSum(value)
```

**Arguments**

-   `value` — Input values, must be [Integer](../../data-types/int-uint.md) or [Float](../../data-types/float.md) type.

**Returned value**

- A gained arithmetic difference of the `Integer` or `Float` type.

**Examples**

Query:

``` sql
SELECT deltaSum(arrayJoin([1, 2, 3]));
```

Result:

``` text
┌─deltaSum(arrayJoin([1, 2, 3]))─┐
│                              2 │
└────────────────────────────────┘
```

Query:

``` sql
SELECT deltaSum(arrayJoin([1, 2, 3, 0, 3, 4, 2, 3]));
```

Result:

``` text
┌─deltaSum(arrayJoin([1, 2, 3, 0, 3, 4, 2, 3]))─┐
│                                             7 │
└───────────────────────────────────────────────┘
```

Query:

``` sql
SELECT deltaSum(arrayJoin([2.25, 3, 4.5]));
```

Result:

``` text
┌─deltaSum(arrayJoin([2.25, 3, 4.5]))─┐
│                                2.25 │
└─────────────────────────────────────┘
```

## See Also {#see-also}

-   [runningDifference](../../functions/other-functions.md#other_functions-runningdifference)