# histogram_values — DuckDB 1.4.4

No description supplied by the engine.

- Reference: /products/haybarn/functions/releases/duckdb-1.4.4/histogram_values/
- JSON: /products/haybarn/functions/api/v1/duckdb-1.4.4/functions/histogram_values.json
- Snapshot ID: duckdb-1.4.4
- Engine: duckdb v1.4.4
- Source ID: 6ddac802ff
- Binary SHA-256: 8d05bee013ea13d6b5d75272d7ddb52b3d6d9cdaf30d1a3e8e82d42757905182
- Captured: 2026-09-05T18:37:36.091Z
- Source: https://github.com/duckdb/duckdb/releases/tag/v1.4.4
- Loaded extensions: autocomplete, core_functions, icu, json, parquet, shell

## Interpretation

- Choose a snapshot matching the target engine and build. The default is captured from the published Haybarn WASM package used by the browser playground. Historical native snapshots are also available.
- Availability is an observation in the recorded build and extension profile, not a guarantee of support in every installation or in WASM.
- Types and descriptions are declarations from duckdb_functions(). Binding can specialize result types. Null means not supplied by the catalog; do not invent defaults, optionality, argument mode, or table output columns.
- Raw parameter arrays preserve catalog order for scalar/aggregate/macro functions. Raw table arguments are alphabetical. Use callingConvention for engine-confirmed positional order and named arguments; null modes are unrecorded. Named does not mean optional. Macro defaults and special named variadic behavior are not supplied by duckdb_functions().
- Catalog examples are source material and may require data or extensions. runnableExamples contains separately verified SQL for the pinned WASM package; sample-data adaptations and guide examples are labeled separately.
- Guide annotations and recipes are separate editorial content. The browser runner always uses Haybarn WASM 1.5.5-rc3, independently of the documentation snapshot.
- All URLs beginning with / are relative to the origin hosting this document. Exports require no JavaScript, cookies, API key, or browser engine.

## Overloads

### overload-13601bba2b6e13b2

Kind: table_macro. Parameter order: catalog-order.

```text
histogram_values(source: unknown, col_name: unknown, bin_count: unknown, technique: unknown) → TABLE
```

Link: /products/haybarn/functions/releases/duckdb-1.4.4/histogram_values/#overload-13601bba2b6e13b2

| Argument | Catalog type | Calling mode |
| --- | --- | --- |
| source | unknown | not recorded |
| col_name | unknown | not recorded |
| bin_count | unknown | not recorded |
| technique | unknown | not recorded |

Declared return type: unknown. Variadic argument type: none declared.
Stability: unknown. Declared side effects: unknown.

Macro definition:

```sql
WITH bins AS (SELECT CASE  WHEN ((((NOT (can_cast_implicitly(min(col_name), CAST(NULL AS BIGINT)) OR can_cast_implicitly(min(col_name), CAST(NULL AS DOUBLE)) OR can_cast_implicitly(min(col_name), CAST(NULL AS TIMESTAMP)))) AND (technique = 'auto')) OR (technique = 'sample'))) THEN (approx_top_k(col_name, bin_count)) WHEN ((technique = 'equi-height')) THEN (quantile(col_name, main.list_apply(generate_series(1, bin_count), (lambda x: (x / CAST(bin_count AS DOUBLE)))))) WHEN ((technique = 'equi-width')) THEN (equi_width_bins(min(col_name), max(col_name), bin_count, CAST('f' AS BOOLEAN))) WHEN (((technique = 'equi-width-nice') OR (technique = 'auto'))) THEN (equi_width_bins(min(col_name), max(col_name), bin_count, CAST('t' AS BOOLEAN))) ELSE "error"(concat('Unrecognized technique ', technique)) END AS bins FROM query_table(CAST("source" AS VARCHAR)))SELECT unnest(map_keys(histogram)) AS bin, unnest(map_values(histogram)) AS count FROM (SELECT CASE  WHEN ((((NOT (can_cast_implicitly(min(col_name), CAST(NULL AS BIGINT)) OR can_cast_implicitly(min(col_name), CAST(NULL AS DOUBLE)) OR can_cast_implicitly(min(col_name), CAST(NULL AS TIMESTAMP)))) AND (technique = 'auto')) OR (technique = 'sample'))) THEN (histogram_exact(col_name, bins)) ELSE histogram(col_name, bins) END AS histogram FROM query_table(CAST("source" AS VARCHAR)) , bins)
```


## Guide recipes

No guide recipes.

## Engine catalog examples

Source examples may require additional data or extensions. Expressions are wrapped in SELECT; execution verification is not recorded.

No catalog examples.

## Additional DuckDB documentation

- [Aggregate Functions](https://duckdb.org/docs/current/sql/functions/aggregates#histogram_valuessource-col_name-technique-bin_count)

## Observed availability

| Snapshot | Observed | Overloads | JSON |
| --- | --- | --- | --- |
| haybarn-1.5.5-rc3 | present | 1 | [reference](/products/haybarn/functions/api/v1/haybarn-1.5.5-rc3/functions/histogram_values.json) |
| duckdb-1.5.5 | present | 1 | [reference](/products/haybarn/functions/api/v1/duckdb-1.5.5/functions/histogram_values.json) |
| duckdb-1.4.4 | present | 1 | [reference](/products/haybarn/functions/api/v1/duckdb-1.4.4/functions/histogram_values.json) |
| duckdb-1.3.2 | present | 1 | [reference](/products/haybarn/functions/api/v1/duckdb-1.3.2/functions/histogram_values.json) |

Engine catalog documentation is derived from MIT-licensed Haybarn and DuckDB. [Notices](/third-party-notices.txt).