SQL -Standardbeschränkung mit Alter Tabelle

#SQL Server

ALTER TABLE College
ADD CONSTRAINT country_default
DEFAULT 'US' FOR college_country;

#PostgreSQL

ALTER TABLE College
ALTER COLUMN college_code SET DEFAULT 'US';

#MySQL

ALTER TABLE College
ALTER college_country SET DEFAULT 'US';

#Oracle

ALTER TABLE College
MODIFY college_country DEFAULT 'US';
SAMER SAEID