public static Select select(String fieldName) { return new Select(fieldName);
    }
@Test
    void numeric_operations() {
        String q = Q.select("*")
                .from("sd1")
                .where("f1").le(1)
                .and("f2").lt(2)
                .and("f3").ge(3)
                .and("f4").gt(4)
                .and("f5").eq(5)
                .and("f6").inRange(6, 7)
                .build();

        assertEquals(q, "yql=select * from sd1 where f1 <= 1 and f2 < 2 and f3 >= 3 and f4 > 4 and f5 = 5 and range(f6, 6, 7)");
    }