mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 10:22:10 +00:00
51 lines
953 B
Markdown
51 lines
953 B
Markdown
---
|
|
slug: /en/sql-reference/aggregate-functions/reference/grouparrayintersect
|
|
sidebar_position: 141
|
|
---
|
|
|
|
# groupArrayIntersect
|
|
|
|
Return an intersection of given arrays (Return all items of arrays, that are in all given arrays).
|
|
|
|
**Syntax**
|
|
|
|
``` sql
|
|
groupArrayIntersect(x)
|
|
```
|
|
|
|
**Arguments**
|
|
|
|
- `x` — Argument (column name or expression).
|
|
|
|
**Returned values**
|
|
|
|
- Array that contains elements that are in all arrays.
|
|
|
|
Type: [Array](../../data-types/array.md).
|
|
|
|
**Examples**
|
|
|
|
Consider table `numbers`:
|
|
|
|
``` text
|
|
┌─a──────────────┐
|
|
│ [1,2,4] │
|
|
│ [1,5,2,8,-1,0] │
|
|
│ [1,5,7,5,8,2] │
|
|
└────────────────┘
|
|
```
|
|
|
|
Query with column name as argument:
|
|
|
|
``` sql
|
|
SELECT groupArrayIntersect(a) as intersection FROM numbers;
|
|
```
|
|
|
|
Result:
|
|
|
|
```text
|
|
┌─intersection──────┐
|
|
│ [1, 2] │
|
|
└───────────────────┘
|
|
```
|