declare
    object_exists exception;
    pragma exception_init (object_exists , -00955);
begin
  execute immediate 'CREATE TABLE GRUPO_CONTRATO (	
    "GRUPOCONTRATO_ID" NUMBER(7,0) PRIMARY KEY,
	"NOMEGRUPOCONTRATO" VARCHAR2(255) NULL,
	"USUARIO_ID" NUMBER(7,0), 
	"ACTIVO" NUMBER(1,0), 
	"FECMODIF" DATE 
   )';
  exception when object_exists then null;
end;
/
declare
    object_exists exception;
    pragma exception_init (object_exists , -00955);
begin
  execute immediate 'CREATE SEQUENCE "GRUPO_CONTRATO_SEQ" MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 1 CACHE 20 NOORDER NOCYCLE';
  exception when object_exists then null;
end;