sys-periods-transact-sql.md

title	sys.periods (Transact-SQL) | Microsoft Docs
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ms.date	06/10/2016
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sys.periods (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2016-xxxx-xxxx-xxx-md]

Returns a row for each table for which periods have been defined.

Column header	Data type	Description
period_type	sysname	Name of the period
period_type_desc	tinyint	The numeric value representing the type of period: 1 = system-time period
object_id	nvarchar(60)	The text description of the type of column: SYSTEM_TIME_PERIOD
object_id	int	The id of the table containing the period_type column
start_column_id	int	The id of the column that defines the lower period boundary
end_column_id	int	The id of the column that defines the upper period boundary

Permissions

[!INCLUDEssCatViewPerm] For more information, see Metadata Visibility Configuration.

See Also

System Views (Transact-SQL)
Object Catalog Views (Transact-SQL)
Catalog Views (Transact-SQL)
sys.all_columns (Transact-SQL)
sys.system_columns (Transact-SQL)
Querying the SQL Server System Catalog FAQ
Temporal Tables