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24 lines
422 B
Markdown
24 lines
422 B
Markdown
---
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toc_priority: 141
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---
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# deltaSum {#agg_functions-deltasum}
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**语法**
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``` sql
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deltaSum(value)
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```
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计算连续行之间的差值和。如果差值为负，则忽略。
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`value`必须是整型或浮点类型。
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示例:
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```sql
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select deltaSum(arrayJoin([1, 2, 3])); -- => 2
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select deltaSum(arrayJoin([1, 2, 3, 0, 3, 4, 2, 3])); -- => 7
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select deltaSum(arrayJoin([2.25, 3, 4.5])); -- => 2.25
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```
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