[QSQLite] select returns all values as QString

[Flamaros]

I put some decimal values in a table and when I do my SELECT query value method return me a QVariant containing only string event for DECIMAL types.

Here are my queries for creation, insertion and select :

query.exec("create table Weight "
"(id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "
"date DATE, "
"morning DECIMAL, "
"noon DECIMAL, "
"evening DECIMAL, "
"comment TEXT, "
"recordDate DATETIME DEFAULT CURRENT_TIMESTAMP)");

query.exec(QString("INSERT INTO Weight (date, morning, noon, evening, comment) VALUES ('%1', %2, %3, %4, '%5')") .arg(date).arg(morning).arg(noon).arg(evening).arg(comments[i]));

query.exec(QString("SELECT date, morning, noon, evening, comment FROM Weight"));

Is there a way to get my values in the corresponding types of table columns?