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Description

syntax: groupUniqArray(x) or groupUniqArray(max_size)(x)

function: Creates an array from different argument values.

SELECT *
FROM arrays_test
┌─s───────┬─arr─────┐
│ alex    │ [1,2]   │
│ hello   │ [1,2]   │
│ World   │ [3,4,5] │
│ Goodbye │ []      │
└─────────┴─────────┘

SELECT groupUniqArray(arr) from arrays_test
┌─groupUniqArray(arr)─┐
│ [[],[1,2],[3,4,5]]  │
└─────────────────────┘

Use case

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Related issues

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