Have you tried the following below?

ij> select columnnumber, columnname, columndatatype
   from sys.systables t, sys.syscolumns, sys.sysschemas s
   where tableid=referenceid and t.schemaid=s.schemaid
     and schemaname='SYS' and tablename='DATA'
   order by columnnumber;

are you getting any rows back?

On 9/14/06, yves pielusenet <yvespielusenet@free.fr> wrote:
after tests I found this statement :
ij> select columnname, columnnumber from sys.systables, sys.syscolumns where referenceid=tableid and tablename='DATA' order by columnnumber;

which works well for me :)

do you see something wrong ?


Le jeudi 14 septembre 2006 à 15:16 -0700, Francois Orsini a écrit :
> Yes,
>
> It all depends how you created the table - have you tried running the
> query by specifying you table name in uppercase such as:
> j> select columnnumber, columnname, columndatatype
>    from sys.systables t, sys.syscolumns, sys.sysschemas s
>    where tableid=referenceid and t.schemaid=s.schemaid
>      and schemaname='SYS' and tablename='DATA'
>    order by columnnumber;
>
> _or_ you can also run "select * from sys.systables" and find out if
> your table appears in the list being retrieved...then check the actual
> table identifier (aka name)...
>
> Hope this helps a bit,
>
> --francois
>
> On 9/14/06, yves pielusenet <yvespielusenet@free.fr> wrote:
>         Hello,
>         I read this :
>         http://wiki.apache.org/db-derby/ListTableColumns
>
>         but I can't retreive the column of my table 'data'. Here is
>         what i
>         tested :
>         ij> select columnnumber, columnname, columndatatype
>             from sys.systables t, sys.syscolumns, sys.sysschemas s
>             where tableid=referenceid and t.schemaid=s.schemaid
>               and schemaname='SYS' and tablename='data'
>             order by columnnumber;
>
>         And the result is :
>
>         COLUMNNUMB&|COLUMNNAME|COLUMNDATATYPE
>         ------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>         0 lignes sélectionnées
>
>         How can I do ?
>
>         thanks,
>
>         --
>         yves piel
>
>
>