QSqlQuery query; query.prepare("select * from XXX"); if(!query.exec()) qDebug() << query.lastError().text(); else returnquery; } 但是有一天,突然同样的代码转到另一个工程后,发现会提示“QSqlError("", "Unable to fetch row", "No query")”。 问题原因: 我的理解是可能是没有指定联接...
if(!query.exec()) qDebug() << query.lastError().text(); else return query; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 但是有一天,突然同样的代码转到另一个工程后,发现会提示“QSqlError("", "Unable to fetch row", "No query")”。 问题原因: ...
然后我修改成:DELETE FROM Vocabulary ORDER BY secs ASC LIMIT 1 却得到:query exec failed: No query Unable to fetch row 一般,这样的信息是在说,我的SQL语句有问题,但我用终端的SQlite3尝试了,SQL查询是没有语法错误的,神马情况? 接着,我在SQlite官网上查询...
"no query unable to fetch row" Owner thecodemonkey86 commented Sep 11, 2020 if it's not too much to ask and your database doesn't contain any confidential information: could I get temporary read only access to it for further analysis? Author icEngineer-tech commented Sep 11, 2020 ...
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Debug模式(1)调试模式-F5 调试模式-图标是三角形加一只虫子下才会进入断点(2)运行模式-Ctrl+R 运行模式-图标是三角形无法进入断点 Release模式(1)默认Release模式下是不能调试的(2)Release模式调试需要加上: QMAKE_CXXFLAGS_RELEASE = $
in query: insert into stats_daily (id, entry_type_id, entry_sub_type_id, app_id, node_id, counter_value, from_time, until_time, user_module, namespace, samples) values (NULL, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?). [attempt to write a readonly database Unable to fetch row]...
cursor() strsql = "select studentsn, studentname from student " + strwhere cur.execute(strsql) tmpnum = 0 for item in cur.fetchall(): irow = tmpnum // 7 icol = tmpnum % 7 tmpnum += 1 btnlayout.setRowMinimumHeight(irow, 80) tmpbtn = QPushButton(item[1]) # tmpbtn.set...
qtnosql的简单介绍 新手求问,Qt中操作sqlite数据库报错,No query Unable to fetch row setInterval(函数名,1000); t: Timer = new Timer(1000, 5); t.addEventListener(TimerEvent.TIMER,函数名); t.addEventListener(TimerEvent.TIMER_COMPLETE, 函数名); t.start();...
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