Extract on some lines from a table

[#1]

Hello everyone,

During the script, if I have a table like:

IDRec, IdPers, DataIscr, DataCanc

1 1 01/01/2010 01/03/2010
2 1 01/06/2010
3 2 11/01/2010 21/03/2010
4 3 11/03/2010
5 5 21/01/2011

How can I make the script to extract only one line for each
IdPers, and where there are multiple lines with
the same IdPers value (see IdPers = 1) extract

only the row DataCanc = null?

Thanks to all and hello

[prieper]

Give it a try with the below:

RawData:
 LOAD * INLINE [
 IDRec, IdPers, DataIscr, DataCanc

 1, 1, 01/01/2010, 01/03/2010
 2, 1, 01/06/2010
 3, 2, 11/01/2010, 21/03/2010
 4, 3, 11/03/2010
 5, 5, 21/01/2011];

Data:
 NOCONCATENATE LOAD
 *
 RESIDENT
 RawData
 WHERE
 IdPers <> PREVIOUS(IdPers)
 ORDER BY
 IDRec DESC;

 DROP TABLE RawData;

HTH
Peter

[#3]

Thank Peter, very much.

But why don't I can use an expressin like:

Load *

,firstsortedvalue(dataCanc, -1) as DataCanc2

group by IdPers;

?

Thank All