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

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minMap

Calculates the minimum from value array according to the keys specified in the key array.

Syntax

`minMap(key, value)`

or

minMap(Tuple(key, value))

Alias: minMappedArrays

:::note

• Passing a tuple of keys and value arrays is identical to passing an array of keys and an array of values.
• The number of elements in key and value must be the same for each row that is totaled. :::

Parameters

• key — Array of keys. Array.
• value — Array of values. Array.

Returned value

• Returns a tuple of two arrays: keys in sorted order, and values calculated for the corresponding keys. Tuple(Array, Array).

Example

Query:

SELECT minMap(a, b)
FROM values('a Array(Int32), b Array(Int64)', ([1, 2], [2, 2]), ([2, 3], [1, 1]))

Result:

┌─minMap(a, b)──────┐
│ ([1,2,3],[2,1,1]) │
└───────────────────┘