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    Selecting data from mysql using qt?

    General and Desktop
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    • D
      Dmytro last edited by

      Try uncomment line 23

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      • D
        doforumda last edited by

        i uncomment line 23 and comment everything below line 23 then it just says
        @
        Starting /home/zafar/c++/dbExample-build-desktop/dbExample...
        @

        and stucks there

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        • D
          Dmytro last edited by

          OH! You use SQL code before
          a.exec()
          !
          Are you sure?

          Create standart QT GUI application and wrote sql code in mainwindow module.

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          • D
            doforumda last edited by

            i am new to qt. how can i create Qt Gui App and do you mean i should write sql code in mainwindow.h file?

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            • D
              doforumda last edited by

              right now i have three files. db.h, db,cpp and main.cpp

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              • D
                Dmytro last edited by

                Run QT Creator.
                Use menu File/new file or project.
                Select QT Gui application.
                ...
                and select SQL checkbox
                ...
                and write sql code in MainWindow.cpp
                ...
                and see SQL Example please

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                • D
                  doforumda last edited by

                  well i tried "File/new file or project and select qt gui app" but i ddint find any sql checkbox anywhere in creating new project

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                  • D
                    Dmytro last edited by

                    no coments...
                    How can I send you screenshot?

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                    • D
                      doforumda last edited by

                      you can add pictures here as screenshots or if you want my email address i ll give you that as well for screenshots

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                      • D
                        doforumda last edited by

                        anyone who can help?

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                        • D
                          Dmytro last edited by

                          !http://hin.dp.ua/files/down/qt_scr.PNG(my screenshot)!

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                          • D
                            doforumda last edited by

                            well i dont have that option. here is what i get
                            when i click file/new file or project then this screenshot
                            "Your text to link here...":http://www.freeimagehosting.net/uploads/702f633ae7.png
                            then i keep clicking next getting the follwoing screenshots
                            "Your text to link here...":http://www.freeimagehosting.net/uploads/ab872acfb8.png
                            "Your text to link here...":http://www.freeimagehosting.net/uploads/45c51ab364.png
                            "Your text to link here...":http://www.freeimagehosting.net/uploads/84605eae46.png
                            "Your text to link here...":http://www.freeimagehosting.net/uploads/84605eae46.png

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                            • D
                              Dii last edited by

                              Well, it should make no problem to have SQL query before exec(), at least I don't have any problem with that.

                              Let's get back to square one:
                              You said if you uncomment the
                              @bool ok = db.open();@
                              then your program hangs. Can we see the value of 'ok'?
                              @qDebug() << ok;@
                              My guess is probably you have problems granting the rights in mysql when you've created the table... have you made
                              @GRANT ALL ON testTwo.* to 'root'at'localhost' IDENTIFIED BY 'somepassword';@
                              (Ouch please replace the 'at' with the 'at' sign, the forum motor uses it for code tags, I don't know how to write it... I hope it's not confusing.
                              I'm not sure if you can do it with empty password, I guess yes, but I never do that.)

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                              • D
                                doforumda last edited by

                                i now put password for root at localhost.
                                when i place qDebug() << ok then it displays this
                                @
                                false
                                QSqlQuery::exec: database not open
                                @

                                false might be the value of ok.

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                                • L
                                  lyuts last edited by

                                  Are you able to connect to your DB from shell?

                                  I'm a rebel in the S.D.G.

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                                  • D
                                    doforumda last edited by

                                    i dont know how to connect to my DB from shell. I install xampp which is easy for me to manage my databases.
                                    how can i connect from shell?

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                                    • L
                                      lyuts last edited by

                                      @mysql -h host -D dbname -u user@

                                      I guess your can omit host parameter if you are connecting to localhost. You might need to specify "-p password" switch also (depends on mysql configuration).

                                      I'm a rebel in the S.D.G.

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                                      • D
                                        doforumda last edited by

                                        i think i did not install any mysql client. bcause it displays this output
                                        @
                                        root@zafar-laptop:/# mysql -h localhost -D testTwo -u root -p xxxxxx
                                        The program 'mysql' can be found in the following packages:

                                        • mysql-client-core-5.1
                                        • mysql-client-5.0
                                        • mysql-cluster-client-5.1
                                          Try: apt-get install <selected package>
                                          @
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                                        • L
                                          lyuts last edited by

                                          Run
                                          @dpkg --list | grep mysql@
                                          and post the output for this command.

                                          I'm a rebel in the S.D.G.

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                                          • D
                                            doforumda last edited by

                                            here it is
                                            @
                                            root@zafar-laptop:/# dpkg --list | grep mysql
                                            ii libmysqlclient-dev 5.1.41-3ubuntu12.6 MySQL database development files
                                            ii libmysqlclient16 5.1.41-3ubuntu12.6 MySQL database client library
                                            ii mysql-common 5.1.41-3ubuntu12.6 MySQL database common files (e.g. /etc/mysql

                                            @

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