IDENTITY now supported in Azure SQL Data Warehouse
发布日期：六月 26, 2017
Azure SQL Data Warehouse now supports the IDENTITY property for the creation of surrogate keys.
IDENTITY is supported in the following contexts:
- SELECT..INTO a table with pre-existing IDENTITY column
- SET IDENTITY_INSERT
- Loading data into tables with IDENTITY through PolyBase INSERT..SELECT or INSERT..VALUES and BCP
- sys.identity_columns DMV
The following are currently not supported:
- DBCC CHECK_IDENT()
See the IDENTITY documentation page for more information.