declare
    object_exists exception;
    pragma exception_init (object_exists , -00955);
begin
  execute immediate
	'CREATE TABLE AUDITORIA_CHAVE
    (
        CHAVE_ID NUMBER(15) NOT NULL,
        CHAVE VARCHAR2(100),
        VALOR VARCHAR2(100),
        PRIMARY KEY (CHAVE_ID, CHAVE)
    )';
	  
  execute immediate 
	'CREATE SEQUENCE CHAVE_SEQ INCREMENT BY 1 START WITH 1 NOCACHE ORDER NOCYCLE';	
	
  exception when object_exists then null;
end;