SQL command and QString?

[SunnySan]

I would like to get the last ID of the table (plandfile)
I got the SQL code for it which gives me a nice single string under:

SELECT id FROM plandfile WHERE id=(SELECT MAX(id) FROM plandfile)

SELECT id FROM plandfile WHERE id=(SELECT MAX(id) FROM plandfile)

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what would be the best way to transform this to a QString??
Is there a method of QSqlquery which return a String??
Please help
Thanks