Count values in a Msaccess table

Question

I am creating my first application and would like to know how count values of a table in Msaccess with the following conditions:

• "requester" and "Status" must contain specific values;
• If it contains the data solicitante = solicitante1 and status = aberto, count all values meeting this condition.

I tried something like this but I can’t return values. I tried using COUNT also.

If anyone can give me a light on how to do the condition test and store the values in a variable. Thanks in advance.

string query7 =  " SELECT (Status_Solicitante)  from Cartoes where Status_Solicitante='"+"Aberto" + Solic+"'";
command7.CommandText = query7;
OleDbDataReader reader7 = command7.ExecuteReader();
while (reader7 .Read())
{
    label11.Text =  reader7.ToString();
}