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51 lines
953 B
Markdown
51 lines
953 B
Markdown
---
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slug: /en/sql-reference/aggregate-functions/reference/grouparrayintersect
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sidebar_position: 141
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---
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# groupArrayIntersect
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Return an intersection of given arrays (Return all items of arrays, that are in all given arrays).
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**Syntax**
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``` sql
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groupArrayIntersect(x)
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```
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**Arguments**
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- `x` — Argument (column name or expression).
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**Returned values**
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- Array that contains elements that are in all arrays.
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Type: [Array](../../data-types/array.md).
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**Examples**
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Consider table `numbers`:
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``` text
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┌─a──────────────┐
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│ [1,2,4] │
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│ [1,5,2,8,-1,0] │
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│ [1,5,7,5,8,2] │
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└────────────────┘
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```
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Query with column name as argument:
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``` sql
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SELECT groupArrayIntersect(a) as intersection FROM numbers;
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```
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Result:
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```text
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┌─intersection──────┐
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│ [1, 2] │
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└───────────────────┘
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```
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