Błąd wykonania zapytania!
SELECT b2_twrgrupy.*
FROM b2_twrgrupy, b2_twrgrupylacznik, b2_twrkarty
WHERE
tgd_gidtyp=tgl_tgdtyp
and tgd_gidnumer=tgl_tgdnumer
and tgl_twrtyp=twr_gidtyp
and tgl_twrnumer=twr_gidnumer
and tgd_dyskont = 1
and twr_dyskont=1
and tgd_tgdnumer = 86
group by tgd_gidnumer
order by tgd_sort asc