How to check if result of request to DB is empty?

[Suliman via Digitalmars-d-learn]

On Saturday, 12 December 2015 at 12:43:36 UTC, Suliman wrote:
> On Saturday, 12 December 2015 at 12:36:10 UTC, Suliman wrote:
>> On Saturday, 12 December 2015 at 12:14:30 UTC, Vadim Lopatin 
>> wrote:
>>> On Saturday, 12 December 2015 at 12:06:21 UTC, Suliman wrote:
>>>> On Saturday, 12 December 2015 at 11:53:51 UTC, Suliman wrote:
>>>>> On Saturday, 12 December 2015 at 11:31:18 UTC, Suliman 
>>>>> wrote:
>>>>>> Oh sorry! I used wrong host! All ok!
>>>>>
>>>>> Yes, there was issue with host name, but it's do not solve 
>>>>> problem. Second DB have same fields and I still getting 
>>>>> false instead moving into while loop
>>>>
>>>> It's look like it do `next` step before return something.
>>>> So if in DB 1 value it will work like:
>>>> do step
>>>> if no value after it --> return false
>>>> if yes --> return true
>>>>
>>>> but I need any way to check if first value in DB is exists. 
>>>> Any suggestion?
>>>
>>> If you expect to have single or zero rows in result, use
>>> if (rs.next()) {
>>>             dbuser = rs.getString(1);
>>>             dbpassword = rs.getString(2);
>>>             writeln(dbuser);
>>> } else {
>>>             writeln("user not found");
>>> }
>>
>> Do not help :( same result. It's return false :(
>
> Ehm... it's seems that issue occur if I have few rs.next() 
> call. I thought it's create new content every time. So I will 
> try to look at my code again.

Could anybody check on their PC, I if `if (rs.next()` and `while 
(rs.next()` will return true or false if there is only one 
element in selection. I still getting same results...