===== Vazba =====
==== SQL vazba z tabulky bw na tabulku az ====
select %%*%% \\ from bw bw \\ left outer join az az on az.az_aa = case when bw_aa > 0 then null else 0 end and az.az_anr = bw.bw_ak and az.az_pos = bw.bw_az