if err != nil {
		t.Errorf("Expected to get no errors, but got %v", err)
	}

	if count != 2 {
		t.Errorf("Row count must be 2, instead got %d", count)
	}
}

func TestSubQueryWithHaving(t *testing.T) {
	users := []User{
		{Name: "subquery_having_1", Age: 10},
		{Name: "subquery_having_2", Age: 20},
		{Name: "subquery_having_3", Age: 30},
		{Name: "subquery_having_4", Age: 40},
	}