[提问]数据库事务处理 [复制链接]

bool QSqlDatabase::commit()

Commits a transaction to the database if the driver supports transactions and a transaction() has been started. Returns true if the operation succeeded. Otherwise it returns false.

Note: For some databases, the commit will fail and return false if there is an active query using the database for a SELECT. Make the query inactive before doing the commit.


这里的Note:说有些数据库在提交前必须先将query 置为无效，用clear()或finish()。  那说的数据库时哪些数据库啊？

有没有关于事务处理的样例代码参考一下。
  

开始事务处理
if(transaction() )
{
...... insert......
//提交
commit()
}