sqllite根据日期来查询，注意引号

    QString strdate=ui->dateEdit->date().toString("yyyy-MM-dd");
    QString strdate1=strdate;
    QString strStartTime =strdate.append(" 00:00:00");
    QString strEndTime = strdate1.append(" 23:59:59");

    QString wheresql=QString("where datetime(time)>=datetime('%1') and datetime(time) <= datetime('%2')").arg(strStartTime).arg(strEndTime);
    dbPage->setOrderSql((QString("%1 %2").arg(countName).arg("asc")));
    dbPage->setWhereSql(wheresql);
    dbPage->select();
    ui->stackedWidget->setCurrentIndex(0);
    ui->btnRetrieval->setText(tr("返回"));

没有引号查询出错