Returns the ID for a specified data type name.
Returns NULL on error or if a caller does not have permission to view the object.
In SQL Server, a user can only view the metadata of securables that the user owns or on which the user has been granted permission. This means that metadata-emitting, built-in functions such as TYPE_ID may return NULL if the user does not have any permission on the object. For more information, see Metadata Visibility Configuration.
A. Looking up the TYPE ID values for single- and two-part type names
The following example returns type ID for single- and two-part type names.
USE tempdb; GO CREATE TYPE NewType FROM int; GO CREATE SCHEMA NewSchema; GO CREATE TYPE NewSchema.NewType FROM int; GO SELECT TYPE_ID('NewType') AS [1 Part Data Type ID], TYPE_ID('NewSchema.NewType') AS [2 Part Data Type ID]; GO
B. Looking up the TYPE ID of a system data type
The following example returns the TYPE ID for the datetime system data type.
SELECT TYPE_NAME(TYPE_ID('datetime')) AS [TYPE_NAME] ,TYPE_ID('datetime') AS [TYPE_ID]; GO