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Developer-C 11.1
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CREATE TYPE empresa_type AS OBJECT ( CNPJ INTEGER, nome_fantasia VARCHAR2(30), pais VARCHAR2(25), fundacao DATE ); /
CREATE TYPE funcionario_type AS OBJECT ( CPF INTEGER, nome VARCHAR2(30), sexo CHAR(1), nasc DATE, empresa REF empresa_type )
CREATE TABLE empresa_tab OF empresa_type (PRIMARY KEY(CNPJ))
CREATE TABLE funcionario_tab OF funcionario_type ( PRIMARY KEY(CPF) )
ALTER TABLE funcionario_tab ADD SCOPE FOR ( empresa ) IS empresa_tab;