A simpleColumnName is used to represent a column when it cannot be qualified by a tableName orbcorrelationName. This is the case when the qualification is fixed, as it is in a column definition within a CREATE TABLE statement.
SQL92Identifier
-- country is a simpleColumnName
CREATE TABLE CONTINENT (COUNTRY VARCHAR(26) NOT NULL PRIMARY KEY,
COUNTRY_ISO_CODE CHAR(2), REGION VARCHAR(26))