SQLite truble

[aMan]

what do you mean with create it on stack? using only one query in the wole object?

no..
just write

QSqlQuery cola("SELECT id, pregunta, respuesta, referencia, dificultad, tema FROM preguntas");

QSqlQuery cola("SELECT id, pregunta, respuesta, referencia, dificultad, tema FROM preguntas");

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and dots " . " instead of the arrows "->" when requesting a member of cola..

then you don't need the "delete cola"..

regards..
aman..