FireDAC.MySQL Sample app demonstrates how to use FireDAC to work with My SQL Database.
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Components used in the Sample App:
- TFDQuery : To execute SQL queries, browse the result sets, and edit the result set records.
- TFDPhysMySQLDriverLink: To link the MySQL driver to an application and set it up. In general, it is enough to only include the FireDAC.Phys.MySQL unit into your application uses clause. The TFDPhysMySQLDriverLink component can be used to specify: The VendorHome – the MySQL installation root folder. The VendorLib – the name and the optional path to the MySQL client library.
- TFDConnection : To establish a connection to a DBMS and to manage associated datasets.
- And some of the UI components, like TDBGrid,TDBComboBox, TFDGUIxWaitCursor1,TFDGUIxLoginDialog1,TFDGUIxErrorDialog1
The simplest to configure connection to MS SQL database at run-time is to build a temporary connection definition: In the sample, the temporary definition is created when clicking the Connect button. Check to how to connect to MySQL Server.
In the demo database, the Categories and Products tables have one-to-many relation by
CategoryID field. Mention the query to the qryCategories.SQL property and qryProducts.SQL property.
Finally, the qryProducts.MasterSource property is set to
dsCategories, while the MasterFields property is set to
CategoryID. This creates a master-details relationship between the datasets. Simple queries execution is demonstrated via ExecSQL method of TFDConnection. Check out the full article in the DocWiki about the FireDAC MySQL Sample.