---
title: "DOMAIN_CONSTRAINTS (Transact-SQL) | Microsoft Docs"
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# DOMAIN_CONSTRAINTS (Transact-SQL)
[!INCLUDE[tsql-appliesto-ss2008-asdb-xxxx-xxx-md](../../includes/tsql-appliesto-ss2008-asdb-xxxx-xxx-md.md)]

  Returns one row for each alias data type in the current database that has a rule bound to it and that can be accessed by current user.  
  
 To retrieve information from these views, specify the fully qualified name of **INFORMATION_SCHEMA.**_view_name_.  
  
|Column name|Data type|Description|  
|-----------------|---------------|-----------------|  
|**CONSTRAINT_CATALOG**|**nvarchar(**128**)**|Database in which the rule exists.|  
|**CONSTRAINT_SCHEMA**|**nvarchar(**128**)**|Name of schema that contains the constraint.<br /><br /> <strong>\*\* Important \*\*</strong> Do not use INFORMATION_SCHEMA views to determine the schema of an object. The only reliable way to find the schema of a object is to query the sys.objects catalog view.|  
|**CONSTRAINT_NAME**|**sysname**|Rule name.|  
|**DOMAIN_CATALOG**|**nvarchar(**128**)**|Database in which the alias data type exists.|  
|**DOMAIN_SCHEMA**|**nvarchar(**128**)**|Name of schema that contains the alias data type.<br /><br /> <strong>\*\* Important \*\*</strong> Do not use INFORMATION_SCHEMA views to determine the schema of a data type. The only reliable way to find the schema of a type is to use the TYPEPROPERTY function.|  
|**DOMAIN_NAME**|**sysname**|Alias data type.|  
|**IS_DEFERRABLE**|**varchar(**2**)**|Specifies whether constraint checking is deferrable. Always returns NO.|  
|**INITIALLY_DEFERRED**|**varchar(**2**)**|Specifies whether constraint checking is at first deferred. Always returns NO.|  
  
## See Also  
 [System Views &#40;Transact-SQL&#41;](https://msdn.microsoft.com/library/35a6161d-7f43-4e00-bcd3-3091f2015e90)   
 [Information Schema Views &#40;Transact-SQL&#41;](~/relational-databases/system-information-schema-views/system-information-schema-views-transact-sql.md)   
 [sys.objects &#40;Transact-SQL&#41;](../../relational-databases/system-catalog-views/sys-objects-transact-sql.md)   
 [sys.types &#40;Transact-SQL&#41;](../../relational-databases/system-catalog-views/sys-types-transact-sql.md)