ClickHouse/docs/en/sql-reference/aggregate-functions/reference/groupsortedarray.md

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groupSortedArray

Returns an array with the first N items in ascending order.

groupSortedArray(N)(column)

Arguments

• N – The number of elements to return.

If the parameter is omitted, default value 10 is used.

Arguments

• x – The value.
• expr — Optional. The field or expresion to sort by. If not set values are sorted by themselves. Integer.

Example

Gets the first 10 numbers:

SELECT groupSortedArray(10)(number) FROM numbers(100)

┌─groupSortedArray(10)(number)─┐
│ [0,1,2,3,4,5,6,7,8,9]        │
└──────────────────────────────┘

Or the last 10:

SELECT groupSortedArray(10)(number, -number) FROM numbers(100)

┌─groupSortedArray(10)(number, negate(number))─┐
│ [99,98,97,96,95,94,93,92,91,90]              │
└──────────────────────────────────────────────┘