qt mysql数据表操作

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

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

    // 打开数据库连接
    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("localhost");
    db.setDatabaseName("testdb");
    db.setUserName("root");
    db.setPassword("password");

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

    // 创建表
    QSqlQuery query;
    query.exec("CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name VARCHAR(255))");

    // 插入数据
    query.exec("INSERT INTO users (name) VALUES ('Alice')");
    query.exec("INSERT INTO users (name) VALUES ('Bob')");

    // 查询数据
    query.exec("SELECT * FROM users");
    while (query.next()) {
        int id = query.value(0).toInt();
        QString name = query.value(1).toString();
        qDebug() << "ID:" << id << "Name:" << name;
    }

    // 关闭数据库连接
    db.close();

    return a.exec();
}