ClickHouse/docs/en/sql-reference/aggregate-functions/reference/minmap.md
2020-09-16 18:14:33 +04:00

29 lines
784 B
Markdown
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
toc_priority: 142
---
# minMap {#agg_functions-minmap}
Syntax: `minMap(key, value)` or `minMap(Tuple(key, value))`
Calculates the minimum from `value` array according to the keys specified in the `key` array.
Passing a tuple of keys and value arrays is identical to passing two arrays of keys and values.
The number of elements in `key` and `value` must be the same for each row that is totaled.
Returns a tuple of two arrays: keys in sorted order, and values calculated for the corresponding keys.
Example:
``` sql
SELECT minMap(a, b)
FROM values('a Array(Int32), b Array(Int64)', ([1, 2], [2, 2]), ([2, 3], [1, 1]))
```
``` text
┌─minMap(a, b)──────┐
│ ([1,2,3],[2,1,1]) │
└───────────────────┘
```