On Wed, 2 Jan 2019, David G. Johnston wrote:
There is no magic name logic involved. A domain is just a type with
inherent constraints that are user definable. You make use of it like any
other type.
Create table tbl (
column_name state_code not null
)
Values stored in column_name are now of type state_code and constrained to
be one of the check constraint values.
David,
I'm not following you. I have two tables each with a column,
state_code char(2) NOT NULL.
Do you mean that I need to write the column constraint for each table? If
not, I don't see from your response how to implement the multi-table
constraint for this column.
Regards,
Rich
