The SYSDOMAIN system view records information about built-in data types (also called domains). The contents of this view does not change during normal operation. The underlying system table for this view is ISYSDOMAIN.
|Column name||Column type||Column constraint|
domain_id The unique number assigned to each data type. These numbers cannot be changed.
domain_name The name of the data type normally found in the CREATE TABLE command, such as CHAR or INTEGER.
type_id The ODBC data type. This value corresponds to the value for data_type in the Transact-SQL-compatibility dbo.SYSTYPES table.
"precision" The number of significant digits that can be stored using this data type. The column value is NULL for non-numeric data types.
PRIMARY KEY (domain_id)