# epoch_us — DuckDB 1.5.5 Extract the epoch component in microseconds from a temporal type - Reference: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/ - JSON: /products/haybarn/functions/api/v1/duckdb-1.5.5/functions/epoch_us.json - Snapshot ID: duckdb-1.5.5 - Engine: duckdb v1.5.5 - Source ID: d8cdaa33fd - Binary SHA-256: 8463eb26527b278109cfddffc4606e1019ebefcfe2eac75efc53c76ed8f282d5 - Captured: 2026-09-05T18:37:40.699Z - Source: https://github.com/duckdb/duckdb/releases/tag/v1.5.5 - 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-3637e41029df3d42 Kind: scalar. Parameter order: catalog-order. ```text epoch_us(temporal: DATE) → BIGINT ``` Link: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/#overload-3637e41029df3d42 | Argument | Catalog type | Calling mode | | --- | --- | --- | | temporal | DATE | not recorded | Declared return type: BIGINT. Variadic argument type: none declared. Stability: CONSISTENT. Declared side effects: false. ### overload-4d484da04e7d9282 Kind: scalar. Parameter order: catalog-order. ```text epoch_us(temporal: INTERVAL) → BIGINT ``` Link: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/#overload-4d484da04e7d9282 | Argument | Catalog type | Calling mode | | --- | --- | --- | | temporal | INTERVAL | not recorded | Declared return type: BIGINT. Variadic argument type: none declared. Stability: CONSISTENT. Declared side effects: false. ### overload-943fd0b1ca9cf9f7 Kind: scalar. Parameter order: catalog-order. ```text epoch_us(temporal: TIME) → BIGINT ``` Link: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/#overload-943fd0b1ca9cf9f7 | Argument | Catalog type | Calling mode | | --- | --- | --- | | temporal | TIME | not recorded | Declared return type: BIGINT. Variadic argument type: none declared. Stability: CONSISTENT. Declared side effects: false. ### overload-571b238e98d95092 Kind: scalar. Parameter order: catalog-order. ```text epoch_us(temporal: TIME WITH TIME ZONE) → BIGINT ``` Link: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/#overload-571b238e98d95092 | Argument | Catalog type | Calling mode | | --- | --- | --- | | temporal | TIME WITH TIME ZONE | not recorded | Declared return type: BIGINT. Variadic argument type: none declared. Stability: CONSISTENT. Declared side effects: false. ### overload-af531d84745e0692 Kind: scalar. Parameter order: catalog-order. ```text epoch_us(temporal: TIME_NS) → BIGINT ``` Link: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/#overload-af531d84745e0692 | Argument | Catalog type | Calling mode | | --- | --- | --- | | temporal | TIME_NS | not recorded | Declared return type: BIGINT. Variadic argument type: none declared. Stability: CONSISTENT. Declared side effects: false. ### overload-1b5614fed55fe732 Kind: scalar. Parameter order: catalog-order. ```text epoch_us(temporal: TIMESTAMP) → BIGINT ``` Link: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/#overload-1b5614fed55fe732 | Argument | Catalog type | Calling mode | | --- | --- | --- | | temporal | TIMESTAMP | not recorded | Declared return type: BIGINT. Variadic argument type: none declared. Stability: CONSISTENT. Declared side effects: false. ### overload-68c59e2193223f77 Kind: scalar. Parameter order: catalog-order. ```text epoch_us(temporal: TIMESTAMP WITH TIME ZONE) → BIGINT ``` Link: /products/haybarn/functions/releases/duckdb-1.5.5/epoch_us/#overload-68c59e2193223f77 | Argument | Catalog type | Calling mode | | --- | --- | --- | | temporal | TIMESTAMP WITH TIME ZONE | not recorded | Declared return type: BIGINT. Variadic argument type: none declared. Stability: CONSISTENT. Declared side effects: false. ## 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. Reported for: overload-3637e41029df3d42, overload-4d484da04e7d9282, overload-943fd0b1ca9cf9f7, overload-571b238e98d95092, overload-af531d84745e0692, overload-1b5614fed55fe732, overload-68c59e2193223f77 ```sql SELECT epoch_us(timestamp '2021-08-03 11:59:44.123456'); ``` ## Runnable examples Executed successfully in Haybarn WASM 1.5.5-rc3. Sample data and guide examples are separate from the original catalog. ```sql SELECT epoch_us(timestamp '2021-08-03 11:59:44.123456'); ``` ## Additional DuckDB documentation - [Timestamp Functions](https://duckdb.org/docs/current/sql/functions/timestamp#epoch_ustimestamp) - [Timestamp with Time Zone Functions](https://duckdb.org/docs/current/sql/functions/timestamptz#epoch_ustimestamptz) ## In other engines ### BigQuery: unix_micros() BigQuery: ```sql SELECT UNIX_MICROS('2008-12-25 15:30:00+00') ``` Haybarn / DuckDB: ```sql SELECT EPOCH_US(CAST('2008-12-25 15:30:00+00' AS TIMESTAMPTZ)) ``` Translation from [SQLGlot](https://github.com/tobymao/sqlglot/blob/3086608e6fd4c41c02dfba47171608d2b193fce2/tests/dialects/test_bigquery.py#L3100). ### Snowflake Snowflake: ```sql SELECT EXTRACT(EPOCH_MICROSECOND FROM CAST('2026-01-06 11:45:00' AS TIMESTAMP_NTZ)) ``` Haybarn / DuckDB: ```sql SELECT EPOCH_US(CAST('2026-01-06 11:45:00' AS TIMESTAMP)) ``` Translation from [SQLGlot](https://github.com/tobymao/sqlglot/blob/3086608e6fd4c41c02dfba47171608d2b193fce2/tests/dialects/test_snowflake.py#L2670). ## Observed availability | Snapshot | Observed | Overloads | JSON | | --- | --- | --- | --- | | haybarn-1.5.5-rc3 | present | 7 | [reference](/products/haybarn/functions/api/v1/haybarn-1.5.5-rc3/functions/epoch_us.json) | | duckdb-1.5.5 | present | 7 | [reference](/products/haybarn/functions/api/v1/duckdb-1.5.5/functions/epoch_us.json) | | duckdb-1.4.4 | present | 7 | [reference](/products/haybarn/functions/api/v1/duckdb-1.4.4/functions/epoch_us.json) | | duckdb-1.3.2 | present | 6 | [reference](/products/haybarn/functions/api/v1/duckdb-1.3.2/functions/epoch_us.json) | Engine catalog documentation is derived from MIT-licensed Haybarn and DuckDB. [Notices](/third-party-notices.txt).