mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 02:12:21 +00:00
1.9 KiB
1.9 KiB
slug | sidebar_position |
---|---|
/en/sql-reference/aggregate-functions/reference/deltasum | 141 |
deltaSum
Sums the arithmetic difference between consecutive rows. If the difference is negative, it is ignored.
:::note The underlying data must be sorted for this function to work properly. If you would like to use this function in a materialized view, you most likely want to use the deltaSumTimestamp method instead. :::
Syntax
deltaSum(value)
Arguments
Returned value
- A gained arithmetic difference of the
Integer
orFloat
type.
Examples
Query:
SELECT deltaSum(arrayJoin([1, 2, 3]));
Result:
┌─deltaSum(arrayJoin([1, 2, 3]))─┐
│ 2 │
└────────────────────────────────┘
Query:
SELECT deltaSum(arrayJoin([1, 2, 3, 0, 3, 4, 2, 3]));
Result:
┌─deltaSum(arrayJoin([1, 2, 3, 0, 3, 4, 2, 3]))─┐
│ 7 │
└───────────────────────────────────────────────┘
Query:
SELECT deltaSum(arrayJoin([2.25, 3, 4.5]));
Result:
┌─deltaSum(arrayJoin([2.25, 3, 4.5]))─┐
│ 2.25 │
└─────────────────────────────────────┘