Use of the system table DOMAIN.DOMAINS
You can use the demo data for the SQL tutorial. Start the Database Studio as database administrator MONA with the password RED and log on to demo database DEMODB: Logging On to a Database.
Create domains. Proceed as described in SQL Tutorial, Domains.
You can use Database Studio to enter and execute SQL statements. More information: Working with SQL Statements: Overview
Note the General Instructions for formulating SQL statements.
You can use the system table DOMAINS to determine the following database information, among other things:
All domains for which the data type DATE was defined
SELECT owner, domainname
FROM DOMAIN.DOMAINS
WHERE datatype = 'DATE'
All of your domains in which a default value was agreed
SELECT domainname, datatype, len, dec, "DEFAULT"
FROM DOMAIN.DOMAINS
WHERE owner = 'MONA'
AND "DEFAULT" IS NOT NULL
Note that the column DEFAULT has to be defined as a special identifier (Identifier in double quotes), since DEFAULT is a reserved keyword.
Constraint of a domain: see DOMAINCONSTRAINTS
Domain for column definition: see COLUMNS