Update
i have added some minor updates for my free Delphi component to help database programmers more. I added the fellowing procedures:

_storeBlob(); save pictures to blob field.
_loadBlob(); Diplay a stored blob field in the TImage.
_loadBlobDX(); Display blob in the TcxImage of DevExpress.
_execSQL(); Execute an SQL commands.
_sqlOrderASC(); Order by ASC a collection of rows.
_sqlOrderDESC(); Order by DESC.
_selectRange(); Select a range of rows in database.

Note: the component is deveoped for Absolute Database, but you can add another databases without remove anything and send me a copy by e-mail.

The component is very easy to use, put it in the Form, click a button and type "_" to let IDE show you all the procedures and functions.

Please, download the full source code here.