groupArrayIntersect - ClickHouse Documentation

groupArrayIntersect

Introduced in: v24.2.0 Return an intersection of given arrays (Return all items of arrays, that are in all given arrays). Syntax

groupArrayIntersect(x)

Arguments

x — Argument (column name or expression). Any

Returned value Returns an array that contains elements that are in all arrays. Array Examples Usage example

Query

-- Create table with Memory engine
CREATE TABLE numbers (
    a Array(Int32)
) ENGINE = Memory;

-- Insert sample data
INSERT INTO numbers VALUES
    ([1,2,4]),
    ([1,5,2,8,-1,0]),
    ([1,5,7,5,8,2]);

SELECT groupArrayIntersect(a) AS intersection FROM numbers;

Response

┌─intersection─┐
│ [1,2]        │
└──────────────┘