declare
    object_exists exception;
    pragma exception_init (object_exists , -00955);
begin
  execute immediate
  	'CREATE TABLE PARAMETROS_ECOMERCE (
	PARAMETROSECOMERCE_ID INTEGER NOT NULL PRIMARY KEY,
	CHAVE VARCHAR2(100) NOT NULL,
	VALOR VARCHAR2(100) NOT NULL,
	ACTIVO INTEGER NOT NULL,
	FECMODIF DATE NOT NULL
	)';
 exception when object_exists then null;
end;
/
declare
    object_exists exception;
    pragma exception_init (object_exists , -00955);
begin
  execute immediate
	'CREATE SEQUENCE PARAMETROS_ECOMERCE_SEQ MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 1 CACHE 20 NOORDER NOCYCLE';
 exception when object_exists then null;
end;
/