QSqlDatabase操作數據庫sqlite3

http://blog.csdn.net/liukang325/article/details/22735339

基本打開數據庫，執行SQL語句：

static const char* DBName = "./test.db";
QFileInfo file(DBName);
if(file.exists() == false)
{
    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName(DBName); //設置數據庫名

    if (!db.open())
    {
        qDebug("數據庫不能打開");
        return -1;
    }

    QSqlQuery query;
    ///創建卡號數據庫
    query.exec("CREATE TABLE tb_card(cardNum varchar(64) PRIMARY KEY, name varchar(64), job varchar(64))");
    query.clear();
 }

select查詢獲取數據：

QSqlQuery query(dbConn);
QString sqlStr;
sqlStr.append("select * from tb_card");
bool isSuccess = query.exec(sqlStr);

QString cardNum, name, job;
int i = 0;
while(query.next()) //query.next()指向查找到的第一條記錄，然後每次後移一條記錄
{
    cardNum.clear();
    name.clear();
    job.clear();
    cardNum.append(query.value(0).toString());
    name.append(query.value(1).toString());
    job.append(query.value(2).toString());
}

記得在pro文件中加入：

QT       += core gui sql