Selecting data from mysql using qt?
-
you can add pictures here as screenshots or if you want my email address i ll give you that as well for screenshots
-
anyone who can help?
-
!http://hin.dp.ua/files/down/qt_scr.PNG(my screenshot)!
-
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 -
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.) -
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.
-
Are you able to connect to your DB from shell?
-
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? -
@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 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>
@
-
Run
@dpkg --list | grep mysql@
and post the output for this command. -
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@
-
How did you create your database? I don't see any mysql server either.
-
well i download xampp and install it. i created database using phpmyadmin.
-
i install xampp in this folder /opt/lampp
and my database is in /opt/lampp/var/mysql
-
Ok, I see. What is the location of your XAMPP installation? try to find the mysql binary there. And use the whole path (since I assume it is not in PATH) when connecting, i.e.
@/path/to/xampp/bin/mysql -D dbname -u username@
UPD: Didn't notice the location of xampp. then try (I guess it would be like this) @/opt/lampp/bin/mysql@
-
now here it what it says
@
root@zafar-laptop:/# /opt/lampp/bin/mysql -D testTwo -h localhost -u root -p 123456
Enter password:
ERROR 1049 (42000): Unknown database '123456'
@
i am providing the right pw -
Try not passing -p switch. I guess you will be prompted to type in your password.
or
@/opt/lampp/bin/mysql -u root testTwo@ -
now it output is Access Denied
@
root@zafar-laptop:/# /opt/lampp/bin/mysql -u root testTwo
ERROR 1045 (28000): Access denied for user 'root'at'localhost' (using password: NO)
@ -
I'm sorry i just confused you with my last post.
@/opt/lampp/bin/mysql -u root -p 123456 testTwo@
I thought that mysql would prompt you but it didn't.
