qt连接mysql更新数据库

#include <QCoreApplication>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QSqlError>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // 创建数据库连接
    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("localhost");
    db.setDatabaseName("your_database_name");
    db.setUserName("your_username");
    db.setPassword("your_password");

    if (!db.open()) {
        qDebug() << "Error: connection with database failed";
        return -1;
    }

    qDebug() << "Database: connection ok";

    // 准备更新语句
    QSqlQuery query;
    QString sql = "UPDATE your_table_name SET column1 = :value1 WHERE id = :id";
    query.prepare(sql);
    query.bindValue(":value1", "new_value");
    query.bindValue(":id", 1);

    if (!query.exec()) {
        qDebug() << "Update failed:" << query.lastError().text();
    } else {
        qDebug() << "Update successful";
    }

    db.close();
    return a.exec();
}

if (!query.exec()) {
    qDebug() << "Update failed:" << query.lastError().text();
}