sqlite数据库 判断表是否存在
发布时间:2020-12-12 19:49:52 所属栏目:百科 来源:网络整理
导读:select count(*) from sqlite_master where type='table' and name='TableName' bool bTableExist = query.exec(QString("select count(*) from sqlite_master where type='table' and name='%1'").arg(strTableName))); //关键的判断if(bTableExist){ qDebu
select count(*) from sqlite_master where type='table' and name='TableName'
bool bTableExist = query.exec(QString("select count(*) from sqlite_master where type='table' and name='%1'").arg(strTableName))); //关键的判断 if(bTableExist) { qDebug() << "table exists"; } else { qDebug() << "table does not exist"; } delete fromLifeCirClewhereRFIDin(selectlimit 400) //使用子查询删除表前400行数据 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |