QSqlDatabase::database uses QHash to retrieve a QSqlDatabase from its name, so it is probably negligibly slower than passing the QSqlDatabase object directly between objects and …

Jan 18, 2025 · Im developing an application in python and Qt Designer with PyQt6. I want to use QSqlDatabase and QSqlTableView. My first problem when connecting QSqlDatabase to mysql …

May 13, 2017 · The QSqlDatabase class represents a connection to a database. The QSqlDatabase class provides an interface for accessing a database through a connection. An …

Feb 14, 2025 · If you need to access an existing QSqlDatabase, it should be accessed with database(). If you chose to have a QSqlDatabase member variable, this needs to be deleted …

May 16, 2013 · Probably your issue is that you have a global variable: QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE"); That means addDatabase() will get called before …

Aug 25, 2014 · Normally you don’t need to open the database connection more than once within your application. When adding a database, you can name the connection :

May 12, 2012 · QT QSqlDatabase open() function creates a sqlite database. 0. Qt: DB connection won't open. 1. Connect to ...

Jun 16, 2022 · @AlexFr said in QSqlDatabase: QMYSQL driver not loaded: I already tried many proposed solutions on other threads in this forum, and also tried some suggestions from …

Jul 28, 2016 · I have a multi threaded Qt application which has multiple threads accessing a single database. Am I required create separate QSqlDatabase connections for performing …

Jun 23, 2022 · Creates an empty, invalid QSqlDatabase object. Use addDatabase(), removeDatabase(), and database() to get valid QSqlDatabase objects. Then you try to call …