Load a new Sqlite database problem

[beware]

Well,
All my SQL querries are create in function

void sql_functions::exec

void sql_functions::exec

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Querries result are store in a structure, and others function can used this value to get back request values with

QString result;
while s_req->data.next()
     result = s_req->data.value(0).toString();

QString result;
while s_req->data.next()
     result = s_req->data.value(0).toString();

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I only clear the querry in the begining of the function.