external_table()
Learn how to use the external_table() function to reference an external table by name.
References an external table by name.
To accelerate queries over external delta tables, see Query acceleration policy.
Syntax
external_table( TableName [, MappingName ] )
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| TableName | string | ✔️ | The name of the external table being queried. Must reference an external table of kind blob, adl, or sql. |
| MappingName | string | A name of a mapping object that maps fields in the external data shards to columns output. |
Authentication and authorization
The authentication method to access an external table is based on the connection string provided during its creation, and the permissions required to access the table vary depending on the authentication method. For more information, see Azure Storage external table or SQL Server external table.
Related content
- External tables overview
- Create and alter Azure Storage external tables
- Create and alter SQL Server external tables.
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