Comments by Rodrigo Alex Rodriguez (Top 12 by date)

Do you have an example?

What is the doubt
And tried this solution but it does not work

https://stackoverflow.com/questions/5747401/how-to-replace-value-in-list-at-same-collection-location

I already solved it, how do I publish it?

More specific, realize that I'm just starting to program,,, please

Completely restructure my method.
The solution to my query is
"select p.codPersona, p.tipoPersona, p.nombreCompleto, p.grado, p.paralelo from Persona p where not exists(select ma.codPersona from MarcacionesAsistencia ma where ma.codPersona = p.codPersona and ma.fecha = # " + dateString + " #)"

to the query does not throw any data

I have a school, as the students arrive, teachers and principal register (with the code, name, date).
The problem is that I can not find a way to generate a report of the students, teachers who did not arrive using a date range.