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38 lines
2.2 KiB
Markdown
38 lines
2.2 KiB
Markdown
# Qt SQL Example
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An exemplary [Qt](https://www.qt.io/) app that connects to SQL server and displays a table from a database. The program was made for educational purposes.
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Compiled Windows and Linux applications with statically-linked libraries can be downloaded from [Releases](https://github.com/andre-wojtowicz/qt-sql-example/releases).
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The application is developed with Qt 5.9.1 on Windows 10 and Ubuntu 16.04.
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The program was tested on MySQL Server 5.5.57 and Microsoft SQL Server 2008 R2 SP3.
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## Client config
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The program reads `config.ini` on startup. The file must be in the app working directory.
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## SQL database drivers
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A comprehensive discussion about SQL database drivers (Qt driver plugins as well as system drivers) can be found in [Qt Documentation](https://doc.qt.io/qt-5/sql-driver.html). MSSQL is handled by the ODBC driver.
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Although binaries of the program have statically-linked libraries, in order to connect from Linux to MSSQL server, one should install ODBC SQL Server driver (e.g. `msodbcsql17`__*__).
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The following section covers the essential tools to develop app with dynamically-linked SQL libraries.
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### Windows 10
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* Both Qt SQL driver plugins (QMYSQL and QODBC) should be already bundled with Qt SDK.
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* MySQL driver can be *installed* by placing `libmysql.dll` from [C API for MySQL (mysqlclient)](https://dev.mysql.com/downloads/connector/c/) in the app working directory.
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* ODBC Driver Manager and SQL Server driver are built in; hence, no further installation is necessary. Alternatively, instead of SQL Server driver, one can use Microsoft ODBC Driver; see [Microsoft Docs](https://docs.microsoft.com/en-us/sql/connect/odbc/windows/microsoft-odbc-driver-for-sql-server-on-windows).
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### Ubuntu 16.04
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Packages with Qt driver plugins and system SQL drivers:
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* MySQL - `libqt5sql5-mysql` `libmysqlclient20`,
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* ODBC ([unixODBC Driver Manager](http://www.unixodbc.org) and Microsoft ODBC Driver) - `libqt5sql5-odbc` `libodbc1` `unixodbc` `odbcinst` `msodbcsql17`__*__.
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__*__ How to install `msodbcsql17` - [Installing the Microsoft ODBC Driver for SQL Server on Linux and macOS](https://docs.microsoft.com/en-us/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server).
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