Writing Data Access CodeCData FireDAC Components for Sybase 2019 - Build 19.0.7354
This section provides a simple scenario that shows how to write the basic data access code needed to pipe Sybase data into your application. The code example chains FireDAC components like TFDConnection and TFDQuery and executes a SELECT query with simple GUI components.
Setting Connection Properties
To begin accessing Sybase through a TFDConnection component and then other FireDAC components, create a connection and link the FireDAC components:
- Initialize the Sybase component: Add a TFDPhysSybaseDriverLink object to your project.
- Link with a TFDConnection object: Set the DriverName property of the TFDConnection object to the Driver Id of the component, CData.Sybase.
- Define connection properties through the TFDPhysSybaseConnectionDefParams object. This object enables you to use Code Insight and compiler syntax checking.
FDConnection1.Name := 'SQLTest'; FDConnection1.DriverName := 'CData.Sybase'; with FDConnection1.Params as TFDPhysCDataSybaseConnectionDefParams do begin ... end;
You can also set connection properties through the FDManager function. See Connection Definitions for other ways to define connections.
Execute SQL Queries to Sybase
You can use the TFDQuery object to execute any SQL statement.
- Set the Connection property of a TFDQuery object to a TFDConnection instance.
- Set the Connected property of the TFDConnection object to True to open the connection.
- Call the Open method to execute SELECT queries with a TFDQuery object.
FDQuery1.Connection := FDConnection1; FDConnection1.Connected := true; FDQuery1.Active := true; FDQuery1.Open('SELECT * FROM Products WHERE ProductName = ''Konbu''');To execute data manipulation statements, use the ExecSQL method -- both TFDConnection and TFDQuery have these methods, with slightly different functionality. See Manipulating Data for examples and more information.
See Querying Data for more information on selecting Sybase data with the TFDQuery class.