Cases of data inconsistency caused by MySQL implicit type conversion

1.1 problem description                   . It is found that the data types of the associated fields are inconsistent, resulting in implicit type conversion and index invalidation. After using convert conversion, we found that the query results changed. Ta ...

Posted by dabbott on Fri, 05 Jun 2020 06:09:46 +0200

Using databases in QT s

When using the database, you need to view the list of drivers supported in the installed QT. Generally, you can view all the driver plug-in files in the plugins/sqldrivers folder in the QT installation directory. This is not the focus of this article, so I will not elaborate. The following should be added to the xxx.pro project file: QT ...

Posted by tuuga on Sun, 07 Jul 2019 01:59:53 +0200