[ecfisa]

Hola.

Un ejemplo:

Código Delphi [-]
begin
  Query.Close;
  Query.Sql.Clear;
  Query.Sql.Add( 'SELECT COUNT(*) AS TOTAL' );
  Query.Sql.Add( 'FROM COUNTRY WHERE CONTINENT = :CONT' );
  Query.ParamByName( 'CONT' ).AsString := 'South America';
  Query.Open;
  ShowMessage( Query.FieldByName( 'TOTAL' ).AsString );
...

Saludos